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#11
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Anyone Recognize This Lens
dj_nme wrote:
Paul Furman wrote: Richard J Kinch wrote: Paul Furman writes: http://patternassociates.com/rico/leica/misc/ouago4.jpg The "Leica M-EOS" indicates a Leica M mount to Canon EF mount converter. This would have to have optical element(s) since the flange distance of the former is much shorter than the latter. http://en.wikipedia.org/wiki/Lens_mount http://en.wikipedia.org/wiki/Leica_M_mount The "OUAGO" item looks to be converting Leica M39 screw mount to some bayonet with focusing, and the item on the left looks to be another focuser. The last link explains the Visoflex SLR adaptation of some sort, for Leica lenses (roughly translated): http://elshaw.tripod.com/Visoflex/Visoflex.html So this is apparently two glass 'teleconverters' attached to a pre-leica lens to make them focus on a 35mm DSLR? I doubt that the Leica Visoflex to Canon EOS adapter has any optical elements in it. Leica produced special long register distance lenses which could only be focused via the use of a Visoflex on a Leica RF camera. The Visoflex is a reflex housing which attaches to the front of a Leica RF camera (there were versions for both M39 and M bayonet) and turns it into a clunky SLR camera. The registration (mount to film plane) distance for the Visoflex is much greater than the registration distance for EOS. So the lens ought to mount without any adapters - or rather with some sort of very slim adapter, right? I would try just holding it up to the mount & moving in & out to see. The Leica to Canon adapter has extra glass in it but the lens is designed to not need that (albeit for a different model). -- Paul Furman www.edgehill.net www.baynatives.com all google groups messages filtered due to spam |
#12
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Anyone Recognize This Lens
On Thu, 29 Jan 2009 18:34:21 -0700, "Homer" wrote:
: Yes its off of an old Leica rangefinder camera. : Its a Leitz Wetzlar. Well, yes, I suppose. In the off chance that any members of the group are too young to remember the ubiquity of the Leica, "Ernst Leitz" was the company that made the lens, and Wetzlar was the city in Germany where it was located. : Its attached to the camera with a Leica to Nikon adaptor. Really? Then why does the camera say "Canon"? Bob |
#13
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Anyone Recognize This Lens
Paul Furman wrote:
dj_nme wrote: Paul Furman wrote: Richard J Kinch wrote: Paul Furman writes: http://patternassociates.com/rico/leica/misc/ouago4.jpg The "Leica M-EOS" indicates a Leica M mount to Canon EF mount converter. This would have to have optical element(s) since the flange distance of the former is much shorter than the latter. http://en.wikipedia.org/wiki/Lens_mount http://en.wikipedia.org/wiki/Leica_M_mount The "OUAGO" item looks to be converting Leica M39 screw mount to some bayonet with focusing, and the item on the left looks to be another focuser. The last link explains the Visoflex SLR adaptation of some sort, for Leica lenses (roughly translated): http://elshaw.tripod.com/Visoflex/Visoflex.html So this is apparently two glass 'teleconverters' attached to a pre-leica lens to make them focus on a 35mm DSLR? I doubt that the Leica Visoflex to Canon EOS adapter has any optical elements in it. Leica produced special long register distance lenses which could only be focused via the use of a Visoflex on a Leica RF camera. The Visoflex is a reflex housing which attaches to the front of a Leica RF camera (there were versions for both M39 and M bayonet) and turns it into a clunky SLR camera. The registration (mount to film plane) distance for the Visoflex is much greater than the registration distance for EOS. So the lens ought to mount without any adapters - or rather with some sort of very slim adapter, right? I would try just holding it up to the mount & moving in & out to see. The Leica to Canon adapter has extra glass in it but the lens is designed to not need that (albeit for a different model). Because the Viso lenses have a long registration distance, that should work. If the Leica RF lens which you have has the lens elements in a group which can unscrew from the barrel, then this unit can be used with the appropriate Visoflex adapter [guess what: a different one for almost each lens. Did Leica would try to gouge it's users? ;-)] on a Visoflex or via a metal ring adapter on almost any SLR camera. I suspect that the Leica to SLR adapters with optical elements are intended for using M39 or M lenses straight on an SLR camera, it should have something like "Leica M to EOS" or "M39 to EOS" stamped on it's barrel somewhere. |
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