Jump to content

M lens codes


andybarton

Recommended Posts

Advertisement (gone after registration)

On 2/19/2020 at 4:00 AM, Al Brown said:

I have successfully 6-bit coded the Zeiss Biogon 21/2.8 to 11134. First with a sharpie for trial and error and when the position was right and the display was showing 21/2.8 I finished with acrylic paint. The code for 11134 Elmarit-M is just one bar far right. White codes do not matter.
PS. Love the 11134 more than the "Zeiss recommended" 11809.
PPS. The coding fixes the vignetting and slight purple fringe of the lens if used without it.

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

My experience was the paint would be worn out soon or later. Replace the flange may be the only solution if you can find a suitable one. 

Link to post
Share on other sites

  • 2 weeks later...
Am 28.3.2020 um 04:26 schrieb Infantasy:

My experience was the paint would be worn out soon or later. Replace the flange may be the only solution if you can find a suitable one. 

No, with some lenses it won't!

Most of the Cosina ZM and VM lenses have a deepening in the bajonett, which protects the paint.
You can see it on the photo from our collegue Al Brown and also here:
https://www.kenrockwell.com/zeiss/zm/21mm-f28.htm#mex

 

Edited by cp995
Link to post
Share on other sites

Thanks for sharing, I will try myself (have the same lens on my M10). Can you help me, how many millimiters are between the screw and the marking?

Edited by KEL
Mistake
Link to post
Share on other sites

  • 2 months later...
On 4/7/2020 at 1:53 PM, cp995 said:

No, with some lenses it won't!

Most of the Cosina ZM and VM lenses have a deepening in the bajonett, which protects the paint.
You can see it on the photo from our collegue Al Brown and also here:
https://www.kenrockwell.com/zeiss/zm/21mm-f28.htm#mex

 

+1

The whole 'Sharpie' ideas was doomed in the first place, and why people couldn't see it is baffling. It was hailed by some because they found the best Sharpie to use, derided by others because their Sharpie was crap, but the end result is that it is only people who never changed their lenses who were giving out the rave reviews!

Edited by 250swb
Link to post
Share on other sites

  • 1 month later...

It seems to me that this is a problem that could be solved (the whole sharpie thing). Perhaps by stickers which have adhesive that peels off easily? Or would that keep the mount from properly mounting?

Or couldn't people making M lenses just code them? I mean it might not matter for people using them on Sony or Fuji bodies, but it could help on others. Would Leica get after them for marking the lenses based on what Leica lens they resemble?

Link to post
Share on other sites

Advertisement (gone after registration)

3 hours ago, carbon_dragon said:

It seems to me that this is a problem that could be solved (the whole sharpie thing). Perhaps by stickers which have adhesive that peels off easily? Or would that keep the mount from properly mounting?

Two problems there, having to do with the tightness of the lens seating on the camera.

It would probably physically mount OK (although perhaps slightly tight or stiff to lock into position) - but the thickness of a sticker (perhaps 0.1mm) would be enough to prevent the lens perfectly focusng all the way to infinity. It would act as a microscopic extension tube or shim between the lens and camera.

And the same tight fit-and-finish means the sticker would eventually get scrubbed and scraped and worn away with every lens change, just like Sharpie™ ink itself.

Link to post
Share on other sites

  • 1 month later...

I just spent too much time trying to find the 6-bit lens encoding for the new Thambar... as I am getting a screw mount adapter TODAY with encoding recesses cut into it, and want to update my adapter. So, for anyone else on a search, I turned up 001100 or WWBBWW as the coding (0=white=W, 1=black=B). Saw it on a video from 2017: https://www.reddotforum.com/content/2017/12/look-new-leica-thambar-m-90mm-f2-2/

Surprisingly the coding wasn't listed on any of the coding tables I saw, which is why it took "too much time" to find it. And none of the lens photos I saw showed the back with the coding, fortunately I saw the video...

Keywords for searches to find this post: Thambar coding, Thambar 6-bit encoding, Thambar screw thread adapter

I purchased two screw mount adapters from Fotodiox. They are excellent. Very nicely finished and deburred. And they have machined in slots for the encoding. HIGHLY recommended for their adapters. They make them without the encoding too. The manufacturing quality is very high, and I worked as a toolmaker and machinist for a lot of years, so I know good metal work when I see it and handle it.

PS: Pete asked me to "please notify Admin that the link to where the table had resided is broken."

Link to post
Share on other sites

  • 1 month later...

Does anyone know where there is an up-to-date list of 6 bit lens codes. The most recent lists I can find, don't include any lenses released after 2008/9. I have purchased a couple of the 7/TT Artisans fast lenses recently and I would like to code them. As these fast wide lenses are only very occasional users, I could not justify a Leica lens purchase for these, unlike what I have for all my main user lenses, which are Leica, LTM, M, R and L. 

Wilson

 

Link to post
Share on other sites

With the caveat that for wide-angles, the exact optical design may make a big difference when it comes to lens coding and removing color edge artifacts, and thus Leica's coding won't necessarily work for others' 21/24/28mm f/1.4s, to reduce green- or red-edge problems (!!!!). I.E. not all 21 f/1.4s are created equal:

The La Vida Leica list is from 2013 and has the 21/24 Summilux and 50 f/0.95: https://lavidaleica.com/content/leica-lens-codes

Popflash Photo has pictures of the coding on:

35 Summilux ASPH FLE is the same as non-FLE (011101)

28 Summilux (110110)

50mm APO-Summicron (weirdly - this does not match the LaVidaLeica list (??) 101001 )

75 Noctilux (111010)

28 Summaron f/5.6 (001011)

90 Thambar (maybe? bad angle of view - 001100)

Other images show:

35 Summarit f/2.4 (010001)

50 Summarit f/2.4 (010010)

75 Summarit f/2.4 (010011)

90 Summarit f/2.4 (010100)

NB: these are the codes as seen held at the 12 o'clock position, reading L to R....

Link to post
Share on other sites

Many thanks Andy. Between the two sources, that is exactly what I needed. Of course, now having the information, I have found the paint in my fine white line paint marker, has set solid, so I will have order a new one from Amazon. 

Wilson

Link to post
Share on other sites

  • 1 month later...
On 11/1/2020 at 5:32 AM, wlaidlaw said:

Does anyone know where there is an up-to-date list of 6 bit lens codes. The most recent lists I can find, don't include any lenses released after 2008/9. I have purchased a couple of the 7/TT Artisans fast lenses recently and I would like to code them. As these fast wide lenses are only very occasional users, I could not justify a Leica lens purchase for these, unlike what I have for all my main user lenses, which are Leica, LTM, M, R and L. 

Wilson

 

Leica publishes a PDF of the lens codes.  You can download a PDF here:

Leica US Lens Code Listing Download

Link to post
Share on other sites

On 11/1/2020 at 12:32 PM, wlaidlaw said:

Does anyone know where there is an up-to-date list of 6 bit lens codes. The most recent lists I can find, don't include any lenses released after 2008/9. I have purchased a couple of the 7/TT Artisans fast lenses recently and I would like to code them. As these fast wide lenses are only very occasional users, I could not justify a Leica lens purchase for these, unlike what I have for all my main user lenses, which are Leica, LTM, M, R and L. 

Wilson

 

Have you tried sending an email to 7 Artisans to see what they suggest?

Link to post
Share on other sites

3 hours ago, Simone_DF said:

Have you tried sending an email to 7 Artisans to see what they suggest?

If you read a bit further up this thread, you would see that I already have all the info I need. It is more to get the correct EXIF on the meta data than the in camera correction. I use a template in Capture One to do that. I generally try a few different codes to see which I prefer but in that In camera correction is fairly mild, I usually stick to the correct focal length and try different generations and apertures of lenses at that length. 

Wilson

Link to post
Share on other sites

  • 3 months later...
On 4/9/2021 at 9:44 PM, adan said:

By the way - the lens list linked on the first post of this thread is reporting "404" - needs update or repair.

 

While waiting for a fix, the list of codes can be retrieved from the archived page:

https://web.archive.org/web/20170616085638/https://www.l-camera-forum.com/leica-news/leica-lens-codes/

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...