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M lens codes


andybarton

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Thanks wlaidlaw and Robert. To Robert, can you please post the link to the discussion on the Rollei?

 

Information on the Rollei 40mm performance is scattered around various threads. Try a search. I've also seen some useful info on the RFF forums.

 

By my short comment I just meant that I should later describe my impressions in another thread rather than this one. Just thought it is better to stick to coding issues in this thread.

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  • 1 month later...

Has anyone used an unassigned (invalid?) code with a lens to identify it? Does the camera accept it and record it?

 

I am thinking about using some of these "unassigned" codes to uniquely identify a lens and then using a Lightroom profile to correct vignetting. For example, giving a code to the 35mm f/3.5 Perar and then correcting its vignetting in Lightroom.

 

I presume that the camera would not do anything with a code it does not recognize, but, if it records it in the EXIF, I could use that code with Lightroom.

 

Does this make any sense, or am I crazy?

 

Guy

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You would need to deconstruct the latest firmware update and see if the code is listed as being recognised. My guess is that the cameras just will not recognise an unlisted code at all. If you were very brave, you could write a special version of the firmware update (it has been done) but if your camera died, I don't think Leica would repair it. It might be possible to reload the original firmware.

 

Wilson

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Hi, Wilson.

 

I don't think I would have to deconstruct the firmware. If a lens code has been assigned, but not publicized yet, as was the case for the Super-Elmar-M ASPH 21mm f/3.4 and the APO-Summicron-M ASPH 50mm f/2.0, the code will bring up the name of the lens.

 

See, for example: http://www.l-camera-forum.com/leica-forum/leica-m9-forum/187653-another-m9-lens-code-revelation.html

 

So I think I will try it. I can't see how any harm could come out of it. Give me a few weeks and I'll report back.

 

Guy

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. If a lens code has been assigned, but not publicized yet, as was the case for the Super-Elmar-M ASPH 21mm f/3.4 and the APO-Summicron-M ASPH 50mm f/2.0, the code will bring up the name of the lens.Guy

 

:D The quoting of the code of the Cron 50 AA makes me think that I have an uncoded, but very good, old Summicron 50 of 1962 : the bayonet mount can be changed... I could buy one with the 6 bit recesses and than code it as an AA , then posting lot of pics with the EXIF data well clear, touting how fantastic is MY Cron 50 AA... :D

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Luigi, if you want to fake the Apo-Summicron-M 50 Asph's lens code then running your files through ExifTool is all it takes.

 

 

If a lens code has been assigned, but not publicized yet, as was the case for the Super-Elmar-M 21 mm 1:3.4 Asph and the Apo-Summicron-M 50 mm 1:2 Asph, the code will bring up the name of the lens.

No, it won't. Instead, it will just bring up the focal length and speed of the lens, such as "21 mm 1:3.4" or "50 mm 1:2".

Edited by 01af
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...

 

No, it won't. Instead, it will just bring up the focal length and speed of the lens, such as "21 mm 1:3.4" or "50 mm 1:2".

 

Good enough. It would still enable me to know that the code is in use, pick another unassigned code and use it as my own "private code" for whatever lens I mount; for example, my Summitar

 

Guy

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  • 1 month later...
What do people code the Zeiss Distagon 15/2.8 as?

 

I asked Zeiss, and they couldn't (wouldn't) help. Some have said as a WATE at 16mm, others had a different view - any consensus?

 

Cheers

John

 

As well as the recommended 28 Elmarit coding, I would try the 11134 Elmarit 21/2.8. This is the coding I found best for the 15mm CV Super Heliar but of course its exit pupil is rather further back than I think the Distagon, which I believe is a retro-focal design. This works well on the M9 but on the M, still has horrible red edges. I understand that this is going to be improved in the next FW update. The Distagon should be better on the M than the CV, as my 16mm Zenitar Fish-Eye, also a retro-focal design, has no noticeable red edges on the M.

 

Wilson

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  • 4 weeks later...
  • 5 months later...

Hi,Could i ask something about this lens code?i'm going to buy a leica m8 and will probably buy some old leica lenses to us on it.does old lenses need this code to work well with the camera, right? There are two possibilities: 1)send the lens to leica in solms to recive the 6 bit code bajonet or buy a kit to do the job at home. Is right? Please tell me if I'm right or if i'm missing some other possibilities ... Thanks a lot!

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Staka,

 

None of the lenses need the 6-bit code. Wide angle lenses perform better because the camera will know what amount of compensation to apply for vignetting and for colour cast at the edges. With 6-bit coding the camera will insert the lens's details into the EXIF file.

 

If you're planning on buying an M8 (an excellent choice if I may say so) then don't forget that you should also buy UV/IR filters to match the filter diameters of all the lenses you intend to use.

 

Pete.

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Staka,

 

Lots of us on the forum have had or still have M8’s but only use them for specialist purposes (infra red photography in my case). We often will have a drawerful of the expensive Leica or B+W UV/IR filters just gathering dust. Once you have decided what lenses you are going to buy and know their filter sizes, I am sure some forum members would be happy to let you have the correct filters at a fraction of the new price. On wider lenses, the Leica filters generally perform better than the other makes, which can often add mild colour casts.

 

Wilson

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Staka won't have mine i'm afraid as i still use them on the M240. BTW i ordered a Leica 39mm recently on e**y and it was difficult to find one below 60 EUR. Now Rocolax UV/IR filters can be had new for less than 30 USD. I bought one for a 40.5mm Rokkor lens and it works fine i must say. It has no internal filter thread though.

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Staka won't have mine i'm afraid as i still use them on the M240. BTW i ordered a Leica 39mm recently on e**y and it was difficult to find one below 60 EUR. Now Rocolax UV/IR filters can be had new for less than 30 USD. I bought one for a 40.5mm Rokkor lens and it works fine i must say. It has no internal filter thread though.

 

I was very glad not to use mine so I no longer get weird pink circles in the sky :)

 

Wilson

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  • 2 weeks later...

I bought a filter in that website store too, which also name uvircut.com. The 39mm UV-IR CUT filter, which I think it is the same quality with B+W one. It work a good job though the price is lower.

And they send me the coupon code, 3718cb28c6, when I shared it with my friends, it works.

If someone else want to try, you may just use it.

:D:p:rolleyes:

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