Lens-naming (6-BIT code?) has vanished after service. 35:2 v4 (M10-D)

[a.noctilux]

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Happy accident would be the answer, but I don't think so as I read in my note for 35 Summicron IV coding

lens type 11310 code 000110 two black bits

 

[grahamc]

11 minutes ago, Al Brown said:

There is another option, that the screw on the lens (someone reminded me here) would cover for the 6-bit coding. Most 35mm Summicron 6-bit codes are fairly together (covering 2 or 4 of the 6 spaces of the coding sticking together) so this is another possibility, especially if there was some dirt or residue in the screw head.

Ah cool, so same result then ... the screws (with or without dirt) 'mimicking' a code ?   I think the fact that this one as 'incorrectly' shown the correct lens type is what's added to the confusion .  What are the chances  

I'm glad we found an earlier M10-D shout showing 'r adapter' .. it kinda rules out the naming having occurred at the camera end. (even though it would've been nice if our D's could do this ) .

Well it's shame whatever was tricking the system has gone, as I was quite happy with the cataloguing advantages 

Edited November 17, 2021 by grahamc

[grahamc]

16 minutes ago, a.noctilux said:

Happy accident would be the answer, but I don't think so as I read in my note for 35 Summicron IV coding

lens type 11310 code 000110 two black bits

 

What is your best guess @a.noctilux .. Screws ?    I think the 2 EXIFs rule out this having happened at the camera's end (the setting of the lens-type I mean), most of all since I don't know how to do it and we don't think it can be done.

It's also not unfeasible that the D models of Leica M's inherit Jedi powers from their owners. Now it’s back may just take some time to rediscover the ways of the force 

Edited November 17, 2021 by grahamc

[a.noctilux]

I don't have M10-D,

in my plain M10, the lens  type put in manually remains when I go back to auto detect and mounting non coded lens.

[evikne]

4 hours ago, grahamc said:

This is the Lightroom catalogue info for my 10-D, which is pretty straightforward because this is the only lens I have that carries over any naming.  Sadly those days are gone, for now

I was even thinking that perhaps the previous owner of my 10-D had coincidentally also been a Cron v4 user (and had perhaps noted it in the 10-D settings as a default lens).  But I don't think you can do that with the 10-D, which is why I always assumed this lens to have been 6-BIT coding. 

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Whatever has happened – if you want to clean up your LR catalog, this plugin can help you. I used it a lot when I had two uncoded lenses and always forgot to manually change the lens name in the camera menu. 😊

[UliWer]

The manual for the M10-D says that by attaching a lens which is not coded a "standard profile" is used which will not write any information about the lens into the EXIF. The manual uses the same description for the R-to-M-adapter: standard profile is used which will not write any information about the lens into the EXIF.

When I use my R--to-M adapter with the M10 (not D !), I never have it in the EXIF, unless I choose it manually from the list of R-lenses. Since you cannot choose anything manually with an M10-D, there should be nothing in the EXIF (as described in the manual), but the adapter - instead of its coding - should behave like any uncoded lens. So perhaps there is someone with an M10-D who has the R-to-M-adapter and who can verify whether my assumption is right, that there is no indication for the adapter,

The coding for the adapter is 111011. The code for the 35mm Summicron v. 4 almost looks as if it was the opposIte : 000110. I cannot really imagine that the camera's electronics mixes up these very different codes or that a screw could "mimic" one at one time and the other next.

I can only imagine that there is something mixed up with the camera's electronics. When did you last update the Firmware? 

Edited November 17, 2021 by UliWer

[lct]

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35/2 v4 coded and uncoded. This screw head is probably the culprit. I would paint it in white and see what happens. Otherwise having your lens coded appears like the only solution.

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[NigelG]

I would paint it in black…

I think the flange reads as white and the (perhaps previously grimy) screw head was detected as 2 blacks

( Although mine was coded so I didn’t have the issue)

Edited November 17, 2021 by NigelG

[grahamc]

1 hour ago, lct said:

35/2 v4 coded and uncoded. This screw head is probably the culprit. I would paint it in white and see what happens. Otherwise having your lens coded appears like the only solution.

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Thanks lct. I’m going to put this down to a previously dirty screw. 
 

 

[grahamc]

7 hours ago, UliWer said:

The manual for the M10-D says that by attaching a lens which is not coded a "standard profile" is used which will not write any information about the lens into the EXIF. The manual uses the same description for the R-to-M-adapter: standard profile is used which will not write any information about the lens into the EXIF.

When I use my R--to-M adapter with the M10 (not D !), I never have it in the EXIF, unless I choose it manually from the list of R-lenses. Since you cannot choose anything manually with an M10-D, there should be nothing in the EXIF (as described in the manual), but the adapter - instead of its coding - should behave like any uncoded lens. So perhaps there is someone with an M10-D who has the R-to-M-adapter and who can verify whether my assumption is right, that there is no indication for the adapter,

The coding for the adapter is 111011. The code for the 35mm Summicron v. 4 almost looks as if it was the opposIte : 000110. I cannot really imagine that the camera's electronics mixes up these very different codes or that a screw could "mimic" one at one time and the other next.

I can only imagine that there is something mixed up with the camera's electronics. When did you last update the Firmware? 

Thanks Uliwer

I haven’t updated the firmware since I’ve owned the camera (3 months or so) but will do an update   
 

this lens was the only one that ever showed a name. my guess is some grime on the lens it’s just quite odd that it resulted in the correct lens being communicated 

Interesting that the Manual states no lens info will be shown, because uncoded lenses all show as R adaptor , and another of my uncoded lenses used on a friends m10-R also shows as R-adaptor.  I’m not really worried about that as to me it just means “unknown” and isn’t an issue to continue that way because I don’t use r adaptors  

I’ll update the firmware also 

 

[grahamc]

On 11/17/2021 at 11:06 PM, evikne said:

Whatever has happened – if you want to clean up your LR catalog, this plugin can help you. I used it a lot when I had two uncoded lenses and always forgot to manually change the lens name in the camera menu. 😊

Thanks for this - looks great.  I just had time to check it out. Did you code your 50:1.4 v3 ?

[evikne]

3 minutes ago, grahamc said:

Thanks for this - looks great.  I just had time to check it out. Did you code your 50:1.4 v3 ?

Yes, I've got it back from service, it got a CLA and 6-bit coding. So no more wrong lens in the EXIF. 😊

[grahamc]

8 minutes ago, evikne said:

Yes, I've got it back from service, it got a CLA and 6-bit coding. So no more wrong lens in the EXIF. 😊

Ah very nice !  Must be convenient.  I'm trying to get to the point where my 35:1.4 v2 will be the only one not sending the name (since it can't be coded). So I thought that my 35 Cron would be one less to do but shame that's not the case now 

[Danner]

Haven't read this whole thread, but,I have a 35 v4 'cron that's 6-bit coded by Wetzlar, so that is definitely an option.  I also suppose it is a good investment in the lens value, if/when the lens might be traded.

[grahamc]

On 11/20/2021 at 5:56 AM, Danner said:

Haven't read this whole thread, but,I have a 35 v4 'cron that's 6-bit coded by Wetzlar, so that is definitely an option.  I also suppose it is a good investment in the lens value, if/when the lens might be traded.

Thanks, I think I'll send my lenses for coding at some point as I really like the cataloguing advantages