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Archive 2009Seeking info on M645 80mm lenses
p.2 #1Seeking info on M645 80mm lenses
jcolwell wrote:
JJNo. The shutter in the lens acts as the second curtain, and the focal plane shutter in the camera acts as the first curtain (or maybe the other way around, I don't remember). This provides a faster X-synch shutter speed for flash. My 1000S body has X-synch at 1/60sec, and this goes to 1/500 with the leaf shutter lens (see photo).
I gave up on the MF lens leaf shutter approach (because it was futile), and I got a Copal 3. I had used LF lenses for many years on a Shen Hao 4x5 field camera, and I hoped that the...Show more →
Thanks. I had a look and play with a couple of the N/L lenses today and I can see why it doesn't work, in practical terms. The blind on the leaf shutter needs to stay open for viewing but then needs to be activated (closed) in the correct sequence to prevent film/sensor being exposed and that is all done by a linkage at the rear of the lens. Yes, the shutter can be fired from the 'mirror lockup' cable release once the blind is closed but there isn't a practical way to open and close the blind with the lens on an adapter. Shame about that.
JJ
JohnJ wrote
I don't own one but isn't the shutter on the N/L cocked by rotating a ring on the lens. The shutter is then fired manually (independant of the camera) from the lens itself with a cable release. So it's entirely useable, but some what like using a view camera with a copal shutter? Very slow and deliberate work only. Please correct me if I am wrong.JJ
I gave up on the MF lens leaf shutter approach (because it was futile), and I got a Copal 3. I had used LF lenses for many years on a Shen Hao 4x5 field camera, and I hoped that the...Show more →
Thanks. I had a look and play with a couple of the N/L lenses today and I can see why it doesn't work, in practical terms. The blind on the leaf shutter needs to stay open for viewing but then needs to be activated (closed) in the correct sequence to prevent film/sensor being exposed and that is all done by a linkage at the rear of the lens. Yes, the shutter can be fired from the 'mirror lockup' cable release once the blind is closed but there isn't a practical way to open and close the blind with the lens on an adapter. Shame about that.
JJ
Jul 27, 2009 at 11:22 PM
p.2 #2Seeking info on M645 80mm lenses
jcolwell wrote:
This provides a faster X-synch shutter speed for flash.
Is this the only advantage?
Happy shooting,
Yakim.
This provides a faster X-synch shutter speed for flash.
Is this the only advantage?
Happy shooting,
Yakim.
Jul 28, 2009 at 01:09 AM
p.2 #3Seeking info on M645 80mm lenses
Yakim Peled wrote:
Is this the only advantage?
Happy shooting,
Yakim.
AFAIK, yes. Having X-synch up to 1/500 sec is a tremendous advantage if you use fill flash in outdoor, daylight conditions.
jcolwell wrote
This provides a faster X-synch shutter speed for flash.Happy shooting,
Yakim.
AFAIK, yes. Having X-synch up to 1/500 sec is a tremendous advantage if you use fill flash in outdoor, daylight conditions.
Jul 28, 2009 at 05:13 AM
p.2 #4Seeking info on M645 80mm lenses
Not if you have X-sync at any speed. 
Happy shooting,
Yakim.
Happy shooting,
Yakim.
Jul 28, 2009 at 05:18 AM
p.2 #5Seeking info on M645 80mm lenses
Yakim Peled wrote:
Not if you have X-sync at any speed.
Are you talking about high speed synch with a flash strobing at high frequency ? That's a nice feature that many modern cameras have, but it's a relatively new capability that the M645 cameras didn't have.
Not if you have X-sync at any speed.
Are you talking about high speed synch with a flash strobing at high frequency ? That's a nice feature that many modern cameras have, but it's a relatively new capability that the M645 cameras didn't have.
Jul 28, 2009 at 06:04 AM
p.2 #6Seeking info on M645 80mm lenses
I know but fortunately I have one of the newer ones.
Happy shooting,
Yakim.
Happy shooting,
Yakim.
Jul 28, 2009 at 06:09 AM
p.2 #7Seeking info on M645 80mm lenses
Yakim Peled wrote:
Not if you have X-sync at any speed.
Happy shooting,
Yakim.
Which requires a leaf shutter. High Speed sync does not achieve that, it fakes it by strobing the flash at a great power loss. You'll get 3-4 times as much power from your flash using a leaf shutter as you will using FP Sync.
The only DSLR's which can truly sync at all speeds are the Nikon D70, D70s, D50 and D40 as well as IIRC the original Canon 1D. All use hybrid mechanical/electronic shutters with shutter speeds above sync being achieved electronically.They're also software limited to 1/500 when using a dedicated flash to prevent unexpected power loss when the flash duration matches or exceeds the shutter open period (an issue as a SB-800 or similar flash will have a duration of approximately 1/1000 of a second at full power).
Not if you have X-sync at any speed.
Happy shooting,
Yakim.
Which requires a leaf shutter. High Speed sync does not achieve that, it fakes it by strobing the flash at a great power loss. You'll get 3-4 times as much power from your flash using a leaf shutter as you will using FP Sync.
The only DSLR's which can truly sync at all speeds are the Nikon D70, D70s, D50 and D40 as well as IIRC the original Canon 1D. All use hybrid mechanical/electronic shutters with shutter speeds above sync being achieved electronically.They're also software limited to 1/500 when using a dedicated flash to prevent unexpected power loss when the flash duration matches or exceeds the shutter open period (an issue as a SB-800 or similar flash will have a duration of approximately 1/1000 of a second at full power).
Jul 28, 2009 at 07:22 AM
p.2 #8Seeking info on M645 80mm lenses
I had the 1D but rarely used that. The 40D/580EX at 1/250 and PF above that is a perfectly adequate combo IMHO.
Happy shooting,
Yakim.
Happy shooting,
Yakim.
Jul 28, 2009 at 07:40 AM
p.2 #9Seeking info on M645 80mm lenses
Yakim Peled wrote:
Not if you have X-sync at any speed.
mawz wrote:
Which requires a leaf shutter. High Speed sync does not achieve that, it fakes it by strobing the flash at a great power loss. You'll get 3-4 times as much power from your flash using a leaf shutter as you will using FP Sync.
Not if you have X-sync at any speed.
mawz wrote:
Which requires a leaf shutter. High Speed sync does not achieve that, it fakes it by strobing the flash at a great power loss. You'll get 3-4 times as much power from your flash using a leaf shutter as you will using FP Sync.
Jul 28, 2009 at 07:44 AM
p.2 #10Seeking info on M645 80mm lenses
I was thinking. Could you please take a picture of your 80mm lens when it's fully stretched and place near it something (e.g. a pack of cigarettes, ruler etc.) that will serve as a scale? You see, I'm a bit bothered by the huge difference of my 120/4 when it's fully stretched (19cm) to it's normal length (12cm).
If you have more than one, that will be great. Just place them one near the other in one shot.
TIA.
Happy shooting,
Yakim.
If you have more than one, that will be great. Just place them one near the other in one shot.
TIA.
Happy shooting,
Yakim.
Jul 28, 2009 at 05:06 PM
p.2 #11Seeking info on M645 80mm lenses
1. Yakim, the 80mm Mamiya stuff is still relatively cheap. Just buy it all, then shoot with it, and re-sell what you don't like. Truly!
2. I swear, this Mamiya talk is driving up the price of used Mamiya gear! Stop!!! My stealth collecting habits are taking a hit!
2. I swear, this Mamiya talk is driving up the price of used Mamiya gear! Stop!!! My stealth collecting habits are taking a hit!
Jul 28, 2009 at 06:30 PM
p.2 #12Seeking info on M645 80mm lenses
Oh Jim. How can I thank thee enough?
Looks like the 80/4 is out. One of these is quite enough. So, 1.9 or 2.8, that is the question.....
Does the 1.9 has an N version?
Happy shooting,
Yakim.
Looks like the 80/4 is out. One of these is quite enough. So, 1.9 or 2.8, that is the question.....
Does the 1.9 has an N version?
Happy shooting,
Yakim.
Jul 29, 2009 at 12:28 AM
p.2 #13Seeking info on M645 80mm lenses
Yakim Peled wrote:
Oh Jim. How can I thank thee enough?
I believe a beer would be appropriate. Your place or mine?
Yakim Peled wrote:
Does the 1.9 has an N version?
Yes. There's a couple of them at KEH.
Oh Jim. How can I thank thee enough?
I believe a beer would be appropriate. Your place or mine?
Yakim Peled wrote:
Does the 1.9 has an N version?
Yes. There's a couple of them at KEH.
Jul 29, 2009 at 04:12 AM
p.2 #14Seeking info on M645 80mm lenses
My place. I won't leave Israel for the foreseeable future. I spend too much money on photographic equipment so I have no money for vacations. 
BTW, if and when I'll buy another lens it will probably be on E-bay or in the B&S forum. I simply have money in my PayPal account that just sits there…..
Happy shooting,
Yakim.
Edited on Jul 29, 2009 at 05:02 AM · View previous versions
BTW, if and when I'll buy another lens it will probably be on E-bay or in the B&S forum. I simply have money in my PayPal account that just sits there…..
Happy shooting,
Yakim.
Edited on Jul 29, 2009 at 05:02 AM · View previous versions
Jul 29, 2009 at 04:46 AM
p.2 #16Seeking info on M645 80mm lenses
Much obliged. I'll look at them in the evening.
Happy shooting,
Yakim.
Happy shooting,
Yakim.
Jul 29, 2009 at 05:01 AM
p.2 #17Seeking info on M645 80mm lenses
Conner999 wrote:
Yakim, images re-sent yesterday.
No luck. No idea why. Did they bounce back?
Happy shooting,
Yakim.
Yakim, images re-sent yesterday.
No luck. No idea why.
Did they bounce back?Happy shooting,
Yakim.
Jul 30, 2009 at 11:19 AM
p.2 #18Seeking info on M645 80mm lenses
Weird. Nope, no bounce back - from either address.. No idea.
Jul 31, 2009 at 07:25 PM
p.2 #19Seeking info on M645 80mm lenses
jcolwell wrote:
JJNo. The shutter in the lens acts as the second curtain, and the focal plane shutter in the camera acts as the first curtain (or maybe the other way around, I don't remember
OK, now my head is exploding!
Can the N/L be used on a 35mm EOS camera or not?
JohnJ wrote
I don't own one but isn't the shutter on the N/L cocked by rotating a ring on the lens. The shutter is then fired manually (independant of the camera) from the lens itself with a cable release. So it's entirely useable, but some what like using a view camera with a copal shutter? Very slow and deliberate work only. Please correct me if I am wrong.JJ
OK, now my head is exploding!
Can the N/L be used on a 35mm EOS camera or not?
Aug 06, 2009 at 04:55 PM
p.2 #20Seeking info on M645 80mm lenses
Cableaddict wrote:
JJNo. The shutter in the lens acts as the second curtain, and the focal plane shutter in the camera acts as the first curtain (or maybe the other way around, I don't rememberOK, now my head is exploding!
Can the N/L be used on a 35mm EOS camera or not?
Yes it can but only if the leaf shutter is left open, ie unused. So you gain no advantage in having the leaf shutter.
JJ
jcolwell wrote
JohnJ wrote
I don't own one but isn't the shutter on the N/L cocked by rotating a ring on the lens. The shutter is then fired manually (independant of the camera) from the lens itself with a cable release. So it's entirely useable, but some what like using a view camera with a copal shutter? Very slow and deliberate work only. Please correct me if I am wrong.JJ
Can the N/L be used on a 35mm EOS camera or not?
Yes it can but only if the leaf shutter is left open, ie unused. So you gain no advantage in having the leaf shutter.
JJ
Aug 06, 2009 at 05:12 PM