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Matching the lens number with the camera options.


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Today I put in my CL a Summicron M 1:2/50 lens Nº2234871, but the camera offers two options for that kind of lens. The numbers in the screen are different from the lens number, so, how can I know which from that numbers belong to my lens?

As I have other M lenses, I saw that the numbers offered as options by the camera are different from the number in front of the lens. Anybody can help me? 

Many thanks in advance.

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Check the numbers for your lenses available on the Leica Wiki page in the M lenses section. If it's not one of those, pick one, do a set of test shots, then pick the other and do another set of test shots, and then use the one that produces the best results. :)

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Today I put in my CL a Summicron M 1:2/50 lens Nº2234871, but the camera offers two options for that kind of lens. The numbers in the screen are different from the lens number, so, how can I know which from that numbers belong to my lens?

As I have other M lenses, I saw that the numbers offered as options by the camera are different from the number in front of the lens. Anybody can help me? 

Many thanks in advance.

The number you quote is the lens serial number not the lens model number. It is a choice of the latter that you are offered. 

From your serial number it looks like one of these (see the model numbers in the first line).

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According to its serial number (2234871) your lens is a 50/2 v2 which is not listed in the Lens Profiles menu (only v3 and v4/v5). I would choose the v3 profile i.e. "50 f/2 11817" but you can try also v4/v5 i.e. "50 f/2 11819/11825/11826/11816".

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According to its serial number (2234871) your lens is a 50/2 v2 which is not listed in the Lens Profiles menu (only v3 and v4/v5). I would choose the v3 profile i.e. "50 f/2 11817" but you can try also v4/v5 i.e. "50 f/2 11819/11825/11826/11816".

 

Many thanks Ict, I choose the V3 profile and I had the best results with it, but the difference isn't great between the V3 and the other options, at least, from my point of view.

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Don't expect too much from "lens profiles"

The differences are minimal, often even non-existent for M and R lenses.

The main reason to dial in your lens is to get the focal length or lens type in EXIF to be able to sort them in Lightroom.

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My take on Leica's lens profiles is that they are not designed to completely eliminate all lens aberration and geometric distortions. Leica lens designers have always done their best to make the imaging performance of their lenses as attractive as possible, which often takes the form of incorporating lens aberrations into the imaging model for best effect.

 

The profiles are best seen as tools to remove the gross aberrations induced by the interaction of a lens and a sensor (for instance the color shifting across the field seen with wide lenses) and to restore the rendering of a lens give its original design intent. This allows the look and feel of photos made with a given lens to achieve more easily the same character the lens was designed to produce regardless of which Leica body it is fitted to.

 

It also suggests a rational notion for why Leica produces no lens profiles for other vendor's lenses: they had no hand in the design intent of those lenses and so should not be 'tuning' them to match a Leica design intent, as apart from the simple practicality of just supporting your own equipment because that's what the users paid you for.. Probably my own notions creepin in too much there, but, eh? That's what happens when I think about these things with no real information to back it up. :D

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