ravid905
Established
How do you modify one of these lenses to bring up the 35 frameline?
40 nokton with 35 framelines
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Lou Iaquinto
Tinshed
Hi David,
I haven't done it but you might want to have a look at this thread:
http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00CcwG
Good luck,
Lou
I haven't done it but you might want to have a look at this thread:
http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00CcwG
Good luck,
Lou
sockeyed
Well-known
I think that on that the author of the post on photo.net took off far more metal than he had to. I saw another 40 Nokton that had been modified and it was nothing like that.
Essentially the owner had taken a file to the right-angle face on the flange (the only one on the lens, I believe), and just took it straight back 1-2mm, maintaining the right angle. angle.
Best thing to do: get a 35mm m-mount lens or adapter and compare to the 40mm/50mm mount. You have to look very carefully to spot the difference.
Good luck!
Essentially the owner had taken a file to the right-angle face on the flange (the only one on the lens, I believe), and just took it straight back 1-2mm, maintaining the right angle. angle.
Best thing to do: get a 35mm m-mount lens or adapter and compare to the 40mm/50mm mount. You have to look very carefully to spot the difference.
Good luck!
KoNickon
Nick Merritt
This sort of alteration makes me nervous, since it seems like it's a more precise task than might first appear. (I'm also not sure it helps with ultimate resale value, either.) I guess I'd rather use the 50 framelines, so you can frame conservatively, rather than doing a "by God and by guess" with the 35.
ravid905
Established
I'm not concerned about resale values, I can guarantee that I will be the last owner of everything I buy. I find it a little akward trying to thing of how far outside the frame it may be with the 50 frameline, whereas with the 35 I know the angle of view isn't too far off. I'd also prefer to not try to hold the frameline selector as well as focus at the same time.
enochRoot
a chymist of some repute
i've done it twice, and it's rather easy. adjust the focus so the lens element is recessed as possible. put some packaging tape across the back, and burnish it down real good around the top metal "ring". basically block off the possibility of any metal flakes falling into the lens or helical. then just use a dremel on slow speed, and it takes literally 1 second. blow all the metal dust off carefully w/ some canned air, take off the tape...and you're good to go. easy-peasy!
Buze
Established
I did it on my new 40 a few hours ago, it was really easy. I used masking tape (2 layers) to project the mount. I use my "rocket blower" to remove particles between the lens tryouts.
I filed with a small flat file the mount bit mentionned in the various threads, I'm sure I filed a lot less than a millimeter of metal in the end. the masking tape returns to its protective duties very easily between tries.
I'm very satisfied with the job, it's clean, and the 35mm frames are very, very comfy 😀
I filed with a small flat file the mount bit mentionned in the various threads, I'm sure I filed a lot less than a millimeter of metal in the end. the masking tape returns to its protective duties very easily between tries.
I'm very satisfied with the job, it's clean, and the 35mm frames are very, very comfy 😀
bronekkozka
Established
as a guide how much less are you getting if you use the 35mm frameline for a 40mm lens, be nice if the R2A had 40mm lines too!!!
Bronek
www.kozka.com
Bronek
www.kozka.com
vrgard
Well-known
Not to challenge anyone else's stated opinion, but I had the opposite reaction. In particular, I purchased a used 40mm M-Rokkor lens in the fall. The previous owner had done the file trick to make it bring up the 35mm framelines and that is one of the very reasons I was interested in purchasing the lens (that, and the fact that it was about the least expensive way I could get a "Leica" lens in the "close to 35mm size"). So, while I'm sure others might be worried about resale value of doing a file job, when one is talking about a lesser expensive lens to begin with that modification may actually make the lens even more desireable. At least it was to me. As always YMMV! ;-)
Buze
Established
Someone on the forum said that on a M2 it was negligeable at infinity (about one "width" of the frame line inside) and about 3 width of the frame line at close focus; I used that rule roughtly and found it was pretty much spot on. It is indeed a LOT closer to the 35mm lines than the 50mm lines!
DoxLeica
Member
40mm with Multi-Framelines
40mm with Multi-Framelines
The 40 I just bought had been modified by the previous owner. On the Leica it brings up the 35 frameline. Press the selector to the 50 frameline and the 35 & 50 framelines ome up at the same time. Sight between the two and you've got it made! Nice touch.
40mm with Multi-Framelines
The 40 I just bought had been modified by the previous owner. On the Leica it brings up the 35 frameline. Press the selector to the 50 frameline and the 35 & 50 framelines ome up at the same time. Sight between the two and you've got it made! Nice touch.
ravid905
Established
I ended up doing it just that exact way. It didn't take too long really, about five minutes or so. Thanks for all the replies I've received.
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