Lens Detail Recording in EXIF

[pippy]

Advertisement (gone after registration)

32 minutes ago, lct said:

... or a 50/2.8 Elmar-M 😉

Or, as you say, an Elmar-M! I believe the LTM- and M-mount versions of the 50mm f2.8 shared the same optical formula so the answer would be to code them both the same!

😸

Philip.

[pippy]

25 minutes ago, Al Brown said:

...another option...would be a possibility of manually entering (and registering in menu) the NAME of the lens used (without corrections) to be written into EXIF.

You mean that Leica could provide a virtual 'keyboard' in the Menu section? Yes; I suppose that would be an option. Especially if there is a touchscreen.

If it does happen you will be able to say "You Heard It Here First!"...

Wishing you good luck with that one!

😺

Philip.

 

[lct]

2 hours ago, pippy said:

There is, however, no possibility of accurately post-coding many of Leicas own 50s from the past such as an LTM 50mm f3.5 Elmar [...]

Accurately no but approximately yes. My LTM 35/3.5 Elmar is hand coded as Summarit 35/2.4 for instance. Easy to do with coded adapters. Here on M11 at f/5.6 with no vignetting correction in PP. With a coded adapter for 50mm lenses i could do the same with a LTM Elmar 50/3.5 coded as Elmar-M 50/2.8 or otherwise. You know this perfectly of course but i'm not sure if the OP is aware of those possibilities.

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!

 

Edited February 23, 2024 by lct

[250swb]

4 hours ago, ChampagneCharlie said:

Waste of time reponse.

Have your manservant take notes but don’t expect Leica to fix anything just to suit you.

[NigelG]

Wait till you find out that your M11 doesn’t even know which aperture you set on that lens it couldn’t name…🫣
 

(Beyond guesswork obv.)

Edited February 23, 2024 by NigelG

[pippy]

4 hours ago, Al Brown said:

Haha thanks. There is one used to enter copyright info as a long standing digital M feature so no excuses there...

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!

 

............

Is that a Vision from The Future?.......I have no idea what that thing is; I've had a really good search over my M-D Typ-262 and can't find that panel anywhere!

Seriously though; That might be a useful thing to have. Sort-of. Does it exist on a real M camera and can lens information be dialled-in using that thing?

Philip.

Edited February 23, 2024 by pippy

[pippy]

Advertisement (gone after registration)

3 hours ago, lct said:

...My LTM 35/3.5 Elmar is hand coded as Summarit 35/2.4 for instance. Easy to do with coded adapters. Here on M11 at f/5.6 with no vignetting correction in PP. With a coded adapter for 50mm lenses i could do the same with a LTM Elmar 50/3.5 coded as Elmar-M 50/2.8 or otherwise...

Oddly enough - and as discussed elsewhere a few months back so apologies to those who have read this previously - I only discovered the 'real' rendering of my 40mm f1.4 Nokton once I had lost the facility with my current 'Colour-M' camera to dial it in as an early 35mm Summilux and, retrospectively, realised that, having corrected numerous optical abberations in-camera (which, to its credit, it did superbly well), I was always losing much of the inherent character of the lens when used wide-open. Lesson-Learned the hard way.

The same sort of thing could be discussed ad nauseam in a 10,000-word lens-by-lens thesis; So Much To Say! So Much To Discuss!

Philip.

Edited February 23, 2024 by pippy

[lct]

A modern camera like the M11 doesn't need 6-bit coding to prevent colour shift issues thanks to its BSI sensor. The way i feel it, the main if not only visible effect of 6-bit coding is on vignetting which is minimal on 50mm lenses and easy to adjust in PP anyway.

[marchyman]

On 2/23/2024 at 3:05 PM, pippy said:

Seriously though; That might be a useful thing to have. Sort-of. Does it exist on a real M camera and can lens information be dialled-in using that thing?

Yes it is a real thing, but it is used for copyright and artist, not lens info.

Copyright and artist are single bits of metadata.  Lens info is spread over several bits of metadata not all of which are simple text strings.   When I use ExifTool to update lens info for an image I set the tags named "FocalLength, MaxApertureValue, Lens, LensInfo, LensMake, LensModel, and LensType.   I suspect some of those may not be needed in that they could be extrapolated from other fields, but what I have now works so I don't change it.

[ChampagneCharlie]

15 hours ago, Al Brown said:

All I would need is such single bit of metadata to recall the lens used from the registered, manually entered future "USER LENSES" menu. The pseudo f/stop is already written and that is all that's needed for 90% of simple folks like me. I am POSITIVE this is easily doable. No corrections needed as I have said before, nothing else.

That would be a useful feature for me. I'm not interested in corrections, either, just the ability to enter a name.

I (with zero knowledge of firmware engineering) would also imagine this is relatively easy to add. If nothing else, it's a change that future freezes can be blamed on!

[lct]

Would be a good idea to improve Cosina sales. Leica's i don't know.

[jdlaing]

58 minutes ago, Al Brown said:

There are quite a few Leica M lenses that do not have the entry nor were 6-bit coded.

Which M bayonet lenses aren’t in the menu?

[lct]

48 minutes ago, Al Brown said:

Let's do this: I will name, say, three, and the rest you will search for yourself. Fair enough?
11307, 11542, 11306, 11120... aw, I already overshot my limit.

Not to contradict you but 11120 (50/1.5) & 11542 (40/2) are not M lenses, and 11306 (35/2.8) & 11307 (35/2) cannot be coded. Not to say i don't like your idea but it would benefit non-Leica lenses in the first place so i would not expect Leica to complicate firmwares any further for them. YMMV.

[lct]

1 hour ago, Al Brown said:

I was merely answering this question, and I answered 100% correctly. All mentioned are "LEICA M BAYONET LENSES".

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!

All M-mount lenses cannot be coded by far but i may be missing something in your idea.

[adan]

Well, technically, the 40mm Summicron-C 11542 is not a -M lens. Nor was the -C mount exactly an M-mount. That is why they are named "-C."

They have the same flange arrangement, but there were clear incompatibilities from the beginning, and noted by Leica at the time (e.g. no frameline support for 40mm in the M mount; no guarantee of perfect focusing with the 90 Elmar-C on M cameras; often they work - sometimes they don't).

And when Leica added the whole lens-ID/6-bit code system (including the menu support) in 2006, they clearly stated it would not support any/all M-mount lenses, only those dating back to 1980 or so (1-2 design-generations back, as of 2006), as listed in the document ("M-lens coding list") you can still download here:

https://leica-camera.com/en-US/photography/m/m-system-service

Thus I can add to your list the following: 11102, 11003, 11801, 11802, 11308, 11309, 11209, 11807, 11129

[lct]

Maybe the OP doesn't need new 6-bit codes but a mere in-camera notepad? I don't know if this has been done in other cameras already but i feel hard to imagine Leica offering this kind of gift to its competitors.

[evikne]

If it's so hard to remember which lens you've used, just snap a picture of it with your phone every time you switch a lens. Much quicker than typing on a fiddly camera keyboard. You can even import these mobile images into LR along with your other images. If the camera clock is running correctly, each mobile image will show which lens the following images were taken with. Then you can very easily batch-rename the following images, until the next mobile image, and so on.

[sebas_]

If you are using Lightroom you could use the plugin https://www.lenstagger.com to change the lens EXIF Data pretty easily. But you need to remember, which shot was with which lens. 
What I haven't figured out is how to properly name the lenses, so that LR lens correction can pick it up automatically. 
I have the Voigtlander VM 35mm f/2 Ultron Aspherical and would like to get it to work, that after changing the lens EXIF the lens correction will choose the right profile automatically. 

I have tried to name the lens "Voigtlander VM 35mm f/2 Ultron Aspherical" and "Ultron VM Aspherical 1:2/35" but after resetting the LR edit, it shows "matching profile cannot be loaded automatically".