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Archive 2016Front-End Filter Improves Corner Smearing
p.73 #1Front-End Filter Improves Corner Smearing
Folks i have the PCX 2500 if anyone wants me to try there CV 35 or 28 with the Hawks adapter i can try and get infinity. So if anyone wants to send and return to me just let me know. Ill be glad to try it for you
Mar 24, 2017 at 12:16 PM
p.73 #2Front-End Filter Improves Corner Smearing
Phillip Reeve wrote:
A more difficult question!
You're likely right about the date; I think I remembered the 2012 date from Bastian's review, but I'm not sure. And the old one was certainly discontinued in 2008...
I think the latest CV 28/2 was released in 2008 but could be wrong.
Here's a review by Bastian of it without any front filter
https://phillipreeve.net/blog/review-voigtlander-ultron-28mm-2-0/
It needs a ton of correction; without front filter it's not a patch on the 1.7/35 without front filter
But it might work out!
According to Cameraquest the 28/2 M version was announced in 2008
"This is a small lens for a fast 28mm! Announced 7/17/08"
https://cameraquest.com/voigtlen.htm (nearly 1/2 way down)
I have both the 28/2 and the 28/1.9 (ltm), but the difficulty will be getting infinity as these lenses do not have shims like the ZM lenses.Good point on the inability to modify infinity distance. How are folks using the CV 35/1.7 with PCX lenses if infinity tweaking is not possible?Cheap, too short adapters 
Phillip,
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
Fred Miranda wrote
mcbroomf wrote
DavidBM wrote
Ha Ha!A more difficult question!
You're likely right about the date; I think I remembered the 2012 date from Bastian's review, but I'm not sure. And the old one was certainly discontinued in 2008...
Fred Miranda wrote
I meant which PCX!I think the latest CV 28/2 was released in 2008 but could be wrong.
DavidBM wrote
The relatively recent 2012 M mount one!Here's a review by Bastian of it without any front filter
https://phillipreeve.net/blog/review-voigtlander-ultron-28mm-2-0/
It needs a ton of correction; without front filter it's not a patch on the 1.7/35 without front filter
But it might work out!
"This is a small lens for a fast 28mm! Announced 7/17/08"
https://cameraquest.com/voigtlen.htm (nearly 1/2 way down)
I have both the 28/2 and the 28/1.9 (ltm), but the difficulty will be getting infinity as these lenses do not have shims like the ZM lenses.
Phillip,
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
Mar 24, 2017 at 12:22 PM
p.73 #3Front-End Filter Improves Corner Smearing
Has anyone called Steve Gandy at camerquest. He is the distributer of CV glass .
Has anyone pulled the mount off of one. Im looking at my CV 12 and there has got to be a way to adjust infinity.
Has anyone pulled the mount off of one. Im looking at my CV 12 and there has got to be a way to adjust infinity.
Mar 24, 2017 at 12:37 PM
p.73 #4Front-End Filter Improves Corner Smearing
Fred Miranda wrote:
A more difficult question!
You're likely right about the date; I think I remembered the 2012 date from Bastian's review, but I'm not sure. And the old one was certainly discontinued in 2008...
I think the latest CV 28/2 was released in 2008 but could be wrong.According to Cameraquest the 28/2 M version was announced in 2008
"This is a small lens for a fast 28mm! Announced 7/17/08"
https://cameraquest.com/voigtlen.htm (nearly 1/2 way down)
I have both the 28/2 and the 28/1.9 (ltm), but the difficulty will be getting infinity as these lenses do not have shims like the ZM lenses.Good point on the inability to modify infinity distance. How are folks using the CV 35/1.7 with PCX lenses if infinity tweaking is not possible?Cheap, too short adapters Phillip,
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.
Phillip Reeve wrote
Fred Miranda wrote
mcbroomf wrote
DavidBM wrote
Ha Ha!A more difficult question!
You're likely right about the date; I think I remembered the 2012 date from Bastian's review, but I'm not sure. And the old one was certainly discontinued in 2008...
Fred Miranda wrote
I meant which PCX!I think the latest CV 28/2 was released in 2008 but could be wrong.
"This is a small lens for a fast 28mm! Announced 7/17/08"
https://cameraquest.com/voigtlen.htm (nearly 1/2 way down)
I have both the 28/2 and the 28/1.9 (ltm), but the difficulty will be getting infinity as these lenses do not have shims like the ZM lenses.
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.
Mar 24, 2017 at 12:50 PM
p.73 #5Front-End Filter Improves Corner Smearing
artur5 wrote:
Supposing a PCX5000 is used with the CV35, an adapter 0.25-0.3mm. too short would do. I don't know if the Hawks has that much for infinity adjust. Anyway, my cheapie Pixco focused already past infinity with normal lenses when I purchased it and now, after tiresome shaving sessions, is only 9.35mm.
I was unable to reach infinity focus with the CV 35/1.7 + PCX 5000 on a Hawks adapter, not even close with max adjustment.
Rob
Supposing a PCX5000 is used with the CV35, an adapter 0.25-0.3mm. too short would do. I don't know if the Hawks has that much for infinity adjust. Anyway, my cheapie Pixco focused already past infinity with normal lenses when I purchased it and now, after tiresome shaving sessions, is only 9.35mm.
I was unable to reach infinity focus with the CV 35/1.7 + PCX 5000 on a Hawks adapter, not even close with max adjustment.
Rob
Mar 24, 2017 at 02:01 PM
p.73 #6Front-End Filter Improves Corner Smearing
robgo2 wrote:
I was unable to reach infinity focus with the CV 35/1.7 + PCX 5000 on a Hawks adapter, not even close with max adjustment.
Rob
We can expect that a "shorter adapter" will be even worse than the Hawks. That tell me that a CV 28/2 + PCX 2000 will be hard to achieve infinity without the removal of internal shims...
Rob, where you able to open up your CV 35 and look for any shims?
artur5 wrote
Supposing a PCX5000 is used with the CV35, an adapter 0.25-0.3mm. too short would do. I don't know if the Hawks has that much for infinity adjust. Anyway, my cheapie Pixco focused already past infinity with normal lenses when I purchased it and now, after tiresome shaving sessions, is only 9.35mm.Rob
We can expect that a "shorter adapter" will be even worse than the Hawks. That tell me that a CV 28/2 + PCX 2000 will be hard to achieve infinity without the removal of internal shims...
Rob, where you able to open up your CV 35 and look for any shims?
Mar 24, 2017 at 02:22 PM
p.73 #7Front-End Filter Improves Corner Smearing
Fred Miranda wrote:
I was unable to reach infinity focus with the CV 35/1.7 + PCX 5000 on a Hawks adapter, not even close with max adjustment.
RobWe can expect that a "shorter adapter" will be even worse than the Hawks. That tell me that a CV 28/2 + PCX 2000 will be hard to achieve infinity without the removal of internal shims...
Rob, where you able to open up your CV 35 and look for any shims?
Fred, I did not even attempt it.
Rob
robgo2 wrote
artur5 wrote
Supposing a PCX5000 is used with the CV35, an adapter 0.25-0.3mm. too short would do. I don't know if the Hawks has that much for infinity adjust. Anyway, my cheapie Pixco focused already past infinity with normal lenses when I purchased it and now, after tiresome shaving sessions, is only 9.35mm.Rob
Rob, where you able to open up your CV 35 and look for any shims?
Fred, I did not even attempt it.
Rob
Mar 24, 2017 at 05:55 PM
p.73 #8Front-End Filter Improves Corner Smearing
Phillip Reeve wrote:
A more difficult question!
You're likely right about the date; I think I remembered the 2012 date from Bastian's review, but I'm not sure. And the old one was certainly discontinued in 2008...
According to Cameraquest the 28/2 M version was announced in 2008
"This is a small lens for a fast 28mm! Announced 7/17/08"
https://cameraquest.com/voigtlen.htm (nearly 1/2 way down)
I have both the 28/2 and the 28/1.9 (ltm), but the difficulty will be getting infinity as these lenses do not have shims like the ZM lenses.Good point on the inability to modify infinity distance. How are folks using the CV 35/1.7 with PCX lenses if infinity tweaking is not possible?Cheap, too short adapters Phillip,
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a...Show more →
Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunately
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
Fred Miranda wrote
Phillip Reeve wrote
Fred Miranda wrote
mcbroomf wrote
DavidBM wrote
Ha Ha!A more difficult question!
You're likely right about the date; I think I remembered the 2012 date from Bastian's review, but I'm not sure. And the old one was certainly discontinued in 2008...
"This is a small lens for a fast 28mm! Announced 7/17/08"
https://cameraquest.com/voigtlen.htm (nearly 1/2 way down)
I have both the 28/2 and the 28/1.9 (ltm), but the difficulty will be getting infinity as these lenses do not have shims like the ZM lenses.
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a...Show more →
Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunately
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
Mar 24, 2017 at 06:05 PM
p.73 #9Front-End Filter Improves Corner Smearing
mcbroomf wrote:
"This is a small lens for a fast 28mm! Announced 7/17/08"
https://cameraquest.com/voigtlen.htm (nearly 1/2 way down)
I have both the 28/2 and the 28/1.9 (ltm), but the difficulty will be getting infinity as these lenses do not have shims like the ZM lenses.Good point on the inability to modify infinity distance. How are folks using the CV 35/1.7 with PCX lenses if infinity tweaking is not possible?Cheap, too short adapters Phillip,
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunately
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
This video shows how to remove some shims from the CV 35/1.4: (right after 5min)
Phillip Reeve wrote
Fred Miranda wrote
Phillip Reeve wrote
Fred Miranda wrote
mcbroomf wrote
According to Cameraquest the 28/2 M version was announced in 2008"This is a small lens for a fast 28mm! Announced 7/17/08"
https://cameraquest.com/voigtlen.htm (nearly 1/2 way down)
I have both the 28/2 and the 28/1.9 (ltm), but the difficulty will be getting infinity as these lenses do not have shims like the ZM lenses.
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
This video shows how to remove some shims from the CV 35/1.4: (right after 5min)
Mar 24, 2017 at 06:42 PM
p.73 #10Front-End Filter Improves Corner Smearing
Fred Miranda wrote:
Cheap, too short adapters Phillip,
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunately
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452This video shows how to remove some shims from the CV 35/1.4: (right after 5min)
Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.
mcbroomf wrote
Phillip Reeve wrote
Fred Miranda wrote
Phillip Reeve wrote
Fred Miranda wrote
Good point on the inability to modify infinity distance. How are folks using the CV 35/1.7 with PCX lenses if infinity tweaking is not possible?Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.
Mar 25, 2017 at 03:54 AM
p.73 #11Front-End Filter Improves Corner Smearing
mcbroomf wrote:
Phillip,
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunately
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452This video shows how to remove some shims from the CV 35/1.4: (right after 5min)Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.
Wait, does that mean this shim removal changes the spacing between elements?
Fred Miranda wrote
mcbroomf wrote
Phillip Reeve wrote
Fred Miranda wrote
Phillip Reeve wrote
Cheap, too short adaptersHave you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
Wait, does that mean this shim removal changes the spacing between elements?
Mar 25, 2017 at 04:11 AM
p.73 #12Front-End Filter Improves Corner Smearing
DavidBM wrote:
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunately
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452This video shows how to remove some shims from the CV 35/1.4: (right after 5min)Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.Wait, does that mean this shim removal changes the spacing between elements?
Not necessarily. I think it depends on whether the rear group moves. ie if it were fixed then the shim would change the front group spacing, but I just checked and on both the 35/1.7 and 28/1.9 the rear group does move. Maybe other's who've taken apart a lens can comment.
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Phillip Reeve wrote
Fred Miranda wrote
Phillip,Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
Not necessarily. I think it depends on whether the rear group moves. ie if it were fixed then the shim would change the front group spacing, but I just checked and on both the 35/1.7 and 28/1.9 the rear group does move. Maybe other's who've taken apart a lens can comment.
Mar 25, 2017 at 04:26 AM
p.73 #13Front-End Filter Improves Corner Smearing
GMPhotography wrote:
So I went into Ace hardware in the plumbing section. I came real close to getting the exact size but its like 47mm in diameter . So what I did was cut it in half laid it in on top of the step up ring 49-55 than put the PCX 5000 in it. What it does is cut down all the extra room and made it tighter in the mount. Still a touch of play but damn close to sitting still and not getting far off center. If your careful once you have it set than you can lay down...Show more →
I took Guy's suggestion and was able to install without cutting the O-ring. Simply put the O-ring around the outside of the PCX-5000 and set it in position. The O-ring helps center the PCX glass quite nicely and I was able to simply screw on the Step down and Retainer rings. Centered glass, no movement. Now I'm just waiting on my Elpro 3.
So I went into Ace hardware in the plumbing section. I came real close to getting the exact size but its like 47mm in diameter . So what I did was cut it in half laid it in on top of the step up ring 49-55 than put the PCX 5000 in it. What it does is cut down all the extra room and made it tighter in the mount. Still a touch of play but damn close to sitting still and not getting far off center. If your careful once you have it set than you can lay down...Show more →
I took Guy's suggestion and was able to install without cutting the O-ring. Simply put the O-ring around the outside of the PCX-5000 and set it in position. The O-ring helps center the PCX glass quite nicely and I was able to simply screw on the Step down and Retainer rings. Centered glass, no movement. Now I'm just waiting on my Elpro 3.
Mar 25, 2017 at 09:02 AM
p.73 #14Front-End Filter Improves Corner Smearing
mcbroomf wrote:
Phillip,
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunately
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452This video shows how to remove some shims from the CV 35/1.4: (right after 5min)Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.
That's how you would have do with the ZM 25 or ZM 28 lenses. A spanner wrench is your friend.
Fred Miranda wrote
mcbroomf wrote
Phillip Reeve wrote
Fred Miranda wrote
Phillip Reeve wrote
Cheap, too short adaptersHave you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
That's how you would have do with the ZM 25 or ZM 28 lenses. A spanner wrench is your friend.
Mar 25, 2017 at 09:17 AM
p.73 #15Front-End Filter Improves Corner Smearing
Fred Miranda wrote:
Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunately
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452This video shows how to remove some shims from the CV 35/1.4: (right after 5min)Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.That's how you would have do with the ZM 25 or ZM 28 lenses. A spanner wrench is your friend.
Yes, I went up to the top post and looked at the Wiki after I watched the video you posted. I may get one and try, but it won't be for a while. The ring is exposed so it doesn't look like the rear group has to be removed with the rubber bung.
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Phillip Reeve wrote
Fred Miranda wrote
Phillip,Have you tried opening up the CV 35/1.7 or 28/2 and looking for any shims?
Relying on cheap adapters is really unreliable. I have bough a few cheap ones and could never reach infinity with the ZM 35/1.4 without shim removal...
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
Yes, I went up to the top post and looked at the Wiki after I watched the video you posted. I may get one and try, but it won't be for a while. The ring is exposed so it doesn't look like the rear group has to be removed with the rubber bung.
Mar 25, 2017 at 10:01 AM
p.73 #16Front-End Filter Improves Corner Smearing
mcbroomf wrote:
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunately
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452This video shows how to remove some shims from the CV 35/1.4: (right after 5min)Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.That's how you would have do with the ZM 25 or ZM 28 lenses. A spanner wrench is your friend. Yes, I went up to the top post and looked at the Wiki after I watched the video you posted. I may get one and try, but it won't be for a while. The ring is exposed so it doesn't look like the rear group has to be removed with the rubber bung.
I may get the CV 28/2 and try it out.
Fred Miranda wrote
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Phillip Reeve wrote
I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
I may get the CV 28/2 and try it out.
Mar 25, 2017 at 10:02 AM
p.73 #17Front-End Filter Improves Corner Smearing
Fred Miranda wrote:
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452This video shows how to remove some shims from the CV 35/1.4: (right after 5min)Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.That's how you would have do with the ZM 25 or ZM 28 lenses. A spanner wrench is your friend. Yes, I went up to the top post and looked at the Wiki after I watched the video you posted. I may get one and try, but it won't be for a while. The ring is exposed so it doesn't look like the rear group has to be removed with the rubber bung.I may get the CV 28/2 and try it out.
Fred, what filter was recommended for the 28/2? I know that the 5m is the one for the 35/1.7
Thx
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunatelyPage 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
Fred, what filter was recommended for the 28/2? I know that the 5m is the one for the 35/1.7
Thx
Mar 25, 2017 at 10:20 AM
p.73 #18Front-End Filter Improves Corner Smearing
mcbroomf wrote:
Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.That's how you would have do with the ZM 25 or ZM 28 lenses. A spanner wrench is your friend. Yes, I went up to the top post and looked at the Wiki after I watched the video you posted. I may get one and try, but it won't be for a while. The ring is exposed so it doesn't look like the rear group has to be removed with the rubber bung.I may get the CV 28/2 and try it out. Fred, what filter was recommended for the 28/2? I know that the 5m is the one for the 35/1.7
Thx
I'll send Haruhiko pictures showing the rear of the lens so perhaps he can calculate the pupil exit distance and the optimal PCX for it. My guess, it will be a PCX 2.5m.
Fred Miranda wrote
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Fred Miranda wrote
This video shows how to remove some shims from the CV 35/1.4: (right after 5min)Thx
I'll send Haruhiko pictures showing the rear of the lens so perhaps he can calculate the pupil exit distance and the optimal PCX for it. My guess, it will be a PCX 2.5m.
Mar 25, 2017 at 10:23 AM
p.73 #19Front-End Filter Improves Corner Smearing
Bust that bad boy open and let see what makes it tick. Lol
Fred Miranda wrote:
That's how you would have do with the ZM 25 or ZM 28 lenses. A spanner wrench is your friend. Yes, I went up to the top post and looked at the Wiki after I watched the video you posted. I may get one and try, but it won't be for a while. The ring is exposed so it doesn't look like the rear group has to be removed with the rubber bung.I may get the CV 28/2 and try it out. Fred, what filter was recommended for the 28/2? I know that the 5m is the one for the 35/1.7
ThxI'll send Haruhiko pictures showing the rear of the lens so perhaps he can calculate the pupil exit distance and the optimal PCX for it. My guess, it will be a PCX 2.5m.
Fred Miranda wrote:
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.Thx
Mar 25, 2017 at 10:34 AM
p.73 #20Front-End Filter Improves Corner Smearing
mcbroomf wrote:
I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunately
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452This video shows how to remove some shims from the CV 35/1.4: (right after 5min)Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.Wait, does that mean this shim removal changes the spacing between elements?Not necessarily. I think it depends on whether the rear group moves. ie if it were fixed then the shim would change the front group spacing, but I just checked and on both the 35/1.7 and 28/1.9 the rear group does move. Maybe other's who've taken apart a lens can comment.
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Fred Miranda wrote:
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452This video shows how to remove some shims from the CV 35/1.4: (right after 5min)Ah, OK I didn't realize you have to remove the rear lens element, I thought the shims were accessible after removing the rear flange which is all I took off. I don't have any tools to do that.That's how you would have do with the ZM 25 or ZM 28 lenses. A spanner wrench is your friend. Yes, I went up to the top post and looked at the Wiki after I watched the video you posted. I may get one and try, but it won't be for a while. The ring is exposed so it doesn't look like the rear group has to be removed with the rubber bung.I may get the CV 28/2 and try it out.
Please do! If it does turn out to be fixable it'd be an inexpensive stop gap 10 blader before Loxia (I doubt it'll challenge the ZF as reigning resolution champ though..)
DavidBM wrote
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Phillip Reeve wrote
I just own the 35 and I tried and two screws resisted my attempts to open them. But I think someone in this thread managed to open it and found no shims to adjust the lens.I am still on the fencer whether to go the Kolari route which would give me access to a wide range of M-mount lenses with close focus adapter or if I go for the front filter solution which is cheaper as long as I use just a few lenses but my CV35 won't work with a close focus adapter. I am not in a hurry though and so far the CV35 is my only M-mount lens and I wasn't bothered by the FC that much.
I am a bit surprised that your ZM didn't reach infinity with the cheap adapter. I own more than a dozen cheap adapters for SLR lenses and without exception they are too short.
Page 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
---------------------------------------------
Fred Miranda wrote:
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Fred Miranda wrote
mcbroomf wrote
Yes,I opened the back of the VC 35/1.7 ... no shims. I checked the 28/1.9. Same unfortunatelyPage 54 https://www.fredmiranda.com/forum/topic/1453834/53#13938452
Please do! If it does turn out to be fixable it'd be an inexpensive stop gap 10 blader before Loxia (I doubt it'll challenge the ZF as reigning resolution champ though..)
Mar 25, 2017 at 01:21 PM