This topic is in the 2009 archive. You can read it and like its posts here. It is read only.
Archive 2009The APO thread
p.8 #1The APO thread
Wow that's pretty intense Jonas, if I still had my 100APO I would test it but alas I don't 
I don't remember it being that bad though, I never saw it in real-world shots.
I don't remember it being that bad though, I never saw it in real-world shots.Nov 02, 2009 at 10:04 PM
p.8 #2The APO thread
Pretty intense, but it is also a test designed to reveal the problem. In real world use the problem showed up from time to time only. Here is an example; first the complete scene, taken outdoors, overcast, no extreme contrasts, but of course strong contrasts in the chrome parts of the bikes. Already at this small size we can see the CA:
Here is the central part of the image enlarged (I don't have the raw file any more) to show more clearly how the defocus CA rears its ugly head:
Then we have another image from the same place and the same time but here I had moved closer:
And a crop from that situation:
And no, there is nothing wrong with the lens. It is perfectly aligned and the resolution is as expected from the Leica MTF curves.
 |
||
| http://photos.imageevent.com/jonas_b/fmforumsmonthly/fmforums2008/596_Leica_100Elmarit_Macro_bikes_scene.jpg | ||
|
Here is the central part of the image enlarged (I don't have the raw file any more) to show more clearly how the defocus CA rears its ugly head:
|
||
| http://photos.imageevent.com/jonas_b/fmforumsmonthly/fmforums2008/596_Leica_100Elmarit_Macro_bikes_blow-up.jpg | ||
|
Then we have another image from the same place and the same time but here I had moved closer:
|
||
| http://photos.imageevent.com/jonas_b/fmforumsmonthly/fmforums2008/599_Leica_100Elmarit_bikes_closer.jpg | ||
|
And a crop from that situation:
|
||
| http://photos.imageevent.com/jonas_b/fmforumsmonthly/fmforums2008/599_Leica_100Elmarit_bikes_closer_crop.jpg | ||
|
And no, there is nothing wrong with the lens. It is perfectly aligned and the resolution is as expected from the Leica MTF curves.
Nov 03, 2009 at 09:40 AM
p.8 #3The APO thread
Jonas,
Are you sure they were taken by Leica 100 APO? Here are my samples that I just shot. The LCA is noticable, but is also acceptable.
f/2.8 Full shot @ 1:2 ratio
http://www.pbase.com/phuang3/image/119053708/original.jpg
100% crop in the center
http://www.pbase.com/phuang3/image/119053711/original.jpg
Are you sure they were taken by Leica 100 APO? Here are my samples that I just shot. The LCA is noticable, but is also acceptable.
f/2.8 Full shot @ 1:2 ratio
http://www.pbase.com/phuang3/image/119053708/original.jpg
100% crop in the center
http://www.pbase.com/phuang3/image/119053711/original.jpg
Nov 04, 2009 at 09:19 AM
p.8 #4The APO thread
phuang3, yes, I'm sure. Recently bought and eager to see what it could do. Here are two other images for your comparison, taken with the well known Zuiko OM90/2 Macro:
and
So the APO Leica did better than the non-APO Zuiko.
You image is taken way closer than my samples. In the bike samples above you can see the Leica does worse in the first image than in the second one. Maybe the distance matter? And, I'm not sure what the, not very big, difference between your bar code and focus sheet means.
(I wish Paul had figured out the ultimate CA test. I have that modified A4 focus test sheet barely covering the sensor as a "formal" test. Then I just look for stuff and fire away liking or not liking what I get.)
|
||
| http://photos.imageevent.com/jonas_b/fmforumsmonthly/fmforums2008/d867_Zuiko_90_M_defocus_CA_f2_crop.jpg | ||
|
and
|
||
| http://photos.imageevent.com/jonas_b/fmforumsmonthly/fmforums2008/d868_Zuiko_90_M_defocus_CA_f2.8_crop.jpg | ||
|
So the APO Leica did better than the non-APO Zuiko.
You image is taken way closer than my samples. In the bike samples above you can see the Leica does worse in the first image than in the second one. Maybe the distance matter? And, I'm not sure what the, not very big, difference between your bar code and focus sheet means.
(I wish Paul had figured out the ultimate CA test. I have that modified A4 focus test sheet barely covering the sensor as a "formal" test. Then I just look for stuff and fire away liking or not liking what I get.)
Nov 04, 2009 at 11:08 AM
p.8 #5The APO thread
I don't think anything beats this sort of test for defocus CA.
Man, that Zuiko is horrible!
Man, that Zuiko is horrible!
Nov 04, 2009 at 11:45 AM
p.8 #6The APO thread
It's a good test indeed. Simple. Any paper will do. The A4 paper I use, placed to barely cover the sensor means a magnification around 1:10 at the focus plane. The test images were developed in ACR with everything set to default or neutral, contrast to linear and of course no sharpening or saturation increase.
The Zuiko isn't horrible. There is a reason for its good reputation and it has beem used for many a wonderful image. In context and with the demanding audience of this thread... well, I just say it isn't APO.
I admired your CV125/2.5 newspaper test image!
The Zuiko isn't horrible. There is a reason for its good reputation and it has beem used for many a wonderful image. In context and with the demanding audience of this thread... well, I just say it isn't APO.
I admired your CV125/2.5 newspaper test image!
Nov 04, 2009 at 11:53 AM
p.8 #7The APO thread
I meant horrible with respect to defocus CA only. I have seen many great images from it, too.
Despite the wonderful (peerless?) performance of the CV 125/2.5, I have sold it. I just wasn't using it as much as I should have and I had other priorities for the money that I had in that lens.
Despite the wonderful (peerless?) performance of the CV 125/2.5, I have sold it. I just wasn't using it as much as I should have and I had other priorities for the money that I had in that lens.
Nov 04, 2009 at 01:47 PM
p.8 #8The APO thread
@Paul: Does your wife know about it already that you sold "her" Voigtlander? 
Nov 04, 2009 at 02:35 PM
p.8 #9The APO thread
AhamB wrote:
@Paul: Does your wife know about it already that you sold "her" Voigtlander?
Yes. We discussed it for hours before making the decision together. It was a somber occasion.
@Paul: Does your wife know about it already that you sold "her" Voigtlander?
Yes. We discussed it for hours before making the decision together. It was a somber occasion.
Nov 04, 2009 at 02:38 PM
p.8 #10The APO thread
cogitech wrote:
Yes. We discussed it for hours before making the decision together. It was a somber occasion.
I feel for you, Paul Sometimes you just have to do what you don't want to do.
AhamB wrote
@Paul: Does your wife know about it already that you sold "her" Voigtlander?Yes. We discussed it for hours before making the decision together. It was a somber occasion.
I feel for you, Paul
Sometimes you just have to do what you don't want to do.Nov 04, 2009 at 03:50 PM
p.8 #11The APO thread
Thanks. It's no real biggy though. We are over it.
In the grand scheme of things, it is just a lens
I'll probably miss it less than my C/Y 21/2.8.
In the grand scheme of things, it is just a lens
I'll probably miss it less than my C/Y 21/2.8.
Nov 04, 2009 at 05:10 PM
brainiac
Offline
[X]
Details
p.8 #12The APO thread
cog is the master of pump and dump ;-)
Nov 04, 2009 at 05:47 PM
p.8 #13The APO thread
brainiac wrote:
cog is the master of pump and dump ;-)
Now that is just plain 'effing nasty.
The real truth; Cog is the master of bad financial planning.
(and you all know the CV 125/2.5 isn't "just a lens", but play along with me here )
cog is the master of pump and dump ;-)
Now that is just plain 'effing nasty.
The real truth; Cog is the master of bad financial planning.
(and you all know the CV 125/2.5 isn't "just a lens", but play along with me here
)Nov 04, 2009 at 05:56 PM
brainiac
Offline
[X]
Details
p.8 #14The APO thread
cogitech wrote:
Now that is just plain 'effing nasty.
Just kidding - I try to follow your recommendations early before the prices go sky high, but I missed the boat with the apo-lanthar
brainiac wrote
cog is the master of pump and dump ;-)Just kidding - I try to follow your recommendations early before the prices go sky high, but I missed the boat with the apo-lanthar
Nov 04, 2009 at 09:44 PM
p.8 #15The APO thread
Most people missed the boat with the APO-Lanthar. The original price was what.. $600?
The going rate when I got mine was around $1100-$1200. I got a fairly good deal because I had access to a different market.
Since then, the price has hit $1400 and higher, from the e-bay auctions I've seen. Hell, I saw a Nikon F mount one climb to over $1600 last week before all the bids were "mysteriously" canceled and the auction ended early.
Someone with a huge ego or an over-active imagination might like to think they had something to do with the price rising so much, but I'm a bit more realistic than that. I think it is just a terrific damn lens in short supply. I also had no intention of ever selling the lens. If there was a way I could have kept it, I would have.
The going rate when I got mine was around $1100-$1200. I got a fairly good deal because I had access to a different market.
Since then, the price has hit $1400 and higher, from the e-bay auctions I've seen. Hell, I saw a Nikon F mount one climb to over $1600 last week before all the bids were "mysteriously" canceled and the auction ended early.
Someone with a huge ego or an over-active imagination might like to think they had something to do with the price rising so much, but I'm a bit more realistic than that. I think it is just a terrific damn lens in short supply. I also had no intention of ever selling the lens. If there was a way I could have kept it, I would have.
Nov 04, 2009 at 09:55 PM
p.8 #16The APO thread
Yup, I, too missed the boat. Based on this forums's sterling examples, I bid on a couple and was just a bit too stingy (or not widly generous enough).
Still, no doubt, a splendid lens. I feel for you, Paul, but, as you say, it's just a lens, and I see another one in your future. Sorry, not in yours. In your wife's...
Still, no doubt, a splendid lens. I feel for you, Paul, but, as you say, it's just a lens, and I see another one in your future. Sorry, not in yours. In your wife's...
Nov 05, 2009 at 12:00 AM
p.8 #17The APO thread
I was one of those who got on the boat with the 125 APO. I bought mine in Contax SLR mount, which was available as special order. Still, since I worked in a camera shop I got a good deal, to say the least.
It's too bad I got off in between stops...
It's too bad I got off in between stops...
Nov 05, 2009 at 01:56 AM
p.8 #18The APO thread
The Lanthar is on my list. My 105/4.5 APO Lanthar for Linhof need a brother...
I really hope that they will start making it again...
I really hope that they will start making it again...
Nov 05, 2009 at 02:08 AM
p.8 #19The APO thread
|
||
| http://forum.mflenses.com/userpix/200910/455_D20_0091_169c_bc_1.jpg | ||
|
Voigtlander Apo-Lanthar 3.5/90mm SL - try that with a non APO lens...
Edited on Nov 05, 2009 at 04:40 AM · View previous versions
Nov 05, 2009 at 04:33 AM
p.8 #20The APO thread
|
||
| http://forum.mflenses.com/userpix/200910/455_CV125mm_0034a_c_1.jpg | ||
|
Voigtlander Makro Apo-Lanthar 2.5/125mm SL
Nov 05, 2009 at 04:38 AM