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Archive 2010 · 35mm framelines for 40mm lenses

  
 
AlexTokyo
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p.1 #1 · p.1 #1 · 35mm framelines for 40mm lenses


For lucky owners of Summicron 40, Rokkor 40/2 CLE and Nokton 40, using them on Leica M bodies pulls 50mm framelines. These are too tight, and many people have modified their lens to pull 35mm framelines, which are almost spot on on the M8. Didn't find clear explanation on what to remove. Actually, I discovered fairly weird mods...

So here it is, hope it might be useful to some. Be aware that modified lenses will not pull 40mm framelines on CLE anymore.

Step 1: select the right lug to shave
http://farm6.static.flickr.com/5208/5233775260_e17e2f0f80_b_d.jpg

Step 2: put in a ziplock to protect lens from shavings (tape generously)
http://farm6.static.flickr.com/5001/5233183779_8583d4881b_b_d.jpg

Step 3: mark about 1mm to be removed w/ permanent marker
http://farm6.static.flickr.com/5285/5233183877_f4f2e17b6a_b_d.jpg

Step 4: Done!
http://farm6.static.flickr.com/5083/5233183955_2a82c7772e_b_d.jpg





Dec 05, 2010 at 01:53 AM
RZetter
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p.1 #2 · p.1 #2 · 35mm framelines for 40mm lenses


Thanks for the detailed howto Alex. How do you find the Nokton 40mm on the M8?


Dec 05, 2010 at 08:46 AM
StevenPA
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p.1 #3 · p.1 #3 · 35mm framelines for 40mm lenses


What did you use to draw in the piece that got shaved off in Step 4?


Dec 05, 2010 at 09:34 AM
AlexTokyo
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p.1 #4 · p.1 #4 · 35mm framelines for 40mm lenses


RZetter wrote:
Thanks for the detailed howto Alex. How do you find the Nokton 40mm on the M8?


Frankly, I don't know yet, as I bought it 2 days ago (MC). So far, I have been impressed by construction. There is no play anywhere, hood is great, and focusing ring feels good, while on the stiff side. Short f/1.4 lenses are notorious for being challenging to focus, this one is no exception. IQ seems on the low side when compared to ZM or Leica, and bokeh is challenging to me (too busy). I bought it as a compact "trainer" (i.e. f/1.4) while I save for the real stuff, and will likely not keep it for too long.



Dec 05, 2010 at 05:27 PM
AlexTokyo
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p.1 #5 · p.1 #5 · 35mm framelines for 40mm lenses


StevenPA wrote:
What did you use to draw in the piece that got shaved off in Step 4?


I used a small square jeweler's file, going very slowly. The all thing including protection and filing took <10'. Never use Dremel tools on lenses, unless you really know what you're doing.



Dec 05, 2010 at 05:31 PM
denoir
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p.1 #6 · p.1 #6 · 35mm framelines for 40mm lenses


AlexTokyo wrote:
Never use Dremel tools on lenses, unless you really know what you're doing.


How come? I thought about coding some of my ZM glass using a Dremel....

http://www.l-camera-forum.com/leica-forum/leica-m8-forum/85813-lens-coding-dremel-notes.html



Dec 05, 2010 at 05:50 PM
AlexTokyo
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p.1 #7 · p.1 #7 · 35mm framelines for 40mm lenses


denoir wrote:
Why not? I thought about coding some of my ZM glass using a Dremel.


Dremel turn so fast that the slightest error always ends up in really bad looking marks. Unless you train on scrap several times and protect lens parts w/ gaffer tape, I wouldn't do it. In your case, protecting the lens around the stencil should be fairly easy.

I've done my share of conversions (including FD 85L to EOS) and with the exception of drilling holes, almost always use jeweler's files and sandpaper. Slower but much safer, especially when working on expensive lenses.



Dec 05, 2010 at 06:04 PM
Sam N
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p.1 #8 · p.1 #8 · 35mm framelines for 40mm lenses


The 40mm Nokton I had was modified this way. It didn't matter on the R3a or R-D1 of course, but it helped a lot on the Ikon. Nice writeup.


Dec 06, 2010 at 12:38 AM
pdmphoto
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p.1 #9 · p.1 #9 · 35mm framelines for 40mm lenses


I agree about using a file. It may take longer but the end result is usually cleaner looking.

BTW, if anyone is interested in a Rokkor 40/2 - I have one from my CLE, which isn't getting used anymore, so I might as well sell it.


AlexTokyo wrote:
Dremel turn so fast that the slightest error always ends up in really bad looking marks. Unless you train on scrap several times and protect lens parts w/ gaffer tape, I wouldn't do it. In your case, protecting the lens around the stencil should be fairly easy.

I've done my share of conversions (including FD 85L to EOS) and with the exception of drilling holes, almost always use jeweler's files and sandpaper. Slower but much safer, especially when working on expensive lenses.




Dec 06, 2010 at 04:30 AM
Spyro P.
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p.1 #10 · p.1 #10 · 35mm framelines for 40mm lenses


I used a file on my rokkor, and I actually hit a sweet spot where it brings up 35mm framelines on my M cameras AND 40mm on my CLE


Dec 06, 2010 at 04:48 AM
mightbenow
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p.1 #11 · p.1 #11 · 35mm framelines for 40mm lenses


Is it possible to take off that whole 40mm mount ring and put on a 35mm on in its place?


Apr 26, 2019 at 12:31 AM
d.s.
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p.1 #12 · p.1 #12 · 35mm framelines for 40mm lenses


Probably not. In the case of the 40/1.4 Nokton, at least, the mount has grooves that integrate with the helicoid. You could check, but I assume the f/1.2 functions similarly.


Apr 26, 2019 at 08:13 AM
Fred Miranda
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p.1 #13 · p.1 #13 · 35mm framelines for 40mm lenses


AlexTokyo wrote:
For lucky owners of Summicron 40, Rokkor 40/2 CLE and Nokton 40, using them on Leica M bodies pulls 50mm framelines. These are too tight, and many people have modified their lens to pull 35mm framelines, which are almost spot on on the M8. Didn't find clear explanation on what to remove. Actually, I discovered fairly weird mods...

So here it is, hope it might be useful to some. Be aware that modified lenses will not pull 40mm framelines on CLE anymore.

Step 1: select the right lug to shave
http://farm6.static.flickr.com/5208/5233775260_e17e2f0f80_b_d.jpg

Step 2: put in a ziplock to protect lens from shavings (tape generously)
http://farm6.static.flickr.com/5001/5233183779_8583d4881b_b_d.jpg

Step
...Show more

this is an older post but I do appreciate it. I'm thinking about doing this to my Voigt 40/2.8 Heliar.



Jun 08, 2022 at 10:37 PM
AmbientMike
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p.1 #14 · p.1 #14 · 35mm framelines for 40mm lenses


What about a shoe mounted finder?


Jun 09, 2022 at 06:24 PM
Desmolicious
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p.1 #15 · p.1 #15 · 35mm framelines for 40mm lenses


AmbientMike wrote:
What about a shoe mounted finder?


I wouldn’t shave that.



Jun 10, 2022 at 08:33 AM
AmbientMike
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p.1 #16 · p.1 #16 · 35mm framelines for 40mm lenses



Desmolicious wrote:
I wouldn’t shave that.


Not sure why you'd shave it?

It's got 35 & 50 mm view. One of the more m39 ones.



Jun 10, 2022 at 10:33 PM
rmg_1977
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p.1 #17 · p.1 #17 · 35mm framelines for 40mm lenses


Thanks, Alex! I realize this thread is almost 15 years old but if your still out there, thank you. It worked like a charm and now pulls up the 35mm lines on my M2.


Apr 25, 2023 at 07:28 PM
AlexTokyo
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p.1 #18 · p.1 #18 · 35mm framelines for 40mm lenses


Glad it helped! I still have both lenses and really enjoyed the Rokkor 40/2 over the years.


Apr 26, 2023 at 07:50 AM
weezintrumpete
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p.1 #19 · p.1 #19 · 35mm framelines for 40mm lenses


I also just found this thread looking for the same thing. Your photos are by FAR the most clear that I could find. Thank you!


Sep 14, 2023 at 06:30 PM





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