M lens codes

[catacore]

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52 minutes ago, lct said:

You don't need a magnifier for the 50/1.5, which is less demanding than the 135/4 in RF mode, but it may help if your visual acuity is not perfect. 

I was thinking that, apart from using the Zeiss 25mm, for which I should snap in the EVF anyway, then the magnifier I could keep permanently on my rangefinder, getting the full rangefinder area for the 50mm and a magnified view for the 135mm - probably something between the 75 and 90 framelines in "normal" (un-magnified) view. But they say one loses some light when using these magnifiers, so it is not a win-win situation.

[lct]

14 minutes ago, catacore said:

I was thinking that, apart from using the Zeiss 25mm, for which I should snap in the EVF anyway, then the magnifier I could keep permanently on my rangefinder, getting the full rangefinder area for the 50mm and a magnified view for the 135mm - probably something between the 75 and 90 framelines in "normal" (un-magnified) view. [...]

 Indeed a magnifier won't change the field of view of your lenses but you'll have the feeling to use a 0.73*1.25 = 0.91x camera i.e. a digital M3 sort of. Perfect for 50mm and above but less so for 35mm and wider lenses for which you would need to remove the magnifier or to use an optical or electronic accessory viewfinder.

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[1joel1]

The longer lenses don't really need coding, 75mm or longer, unless you just want exif data. I have both a thick paper and a metal template. They both work fine and I use flat black paint pen only. The white spots are not needed.

[lct]

54 minutes ago, 1joel1 said:

The longer lenses don't really need coding, 75mm or longer, unless you just want exif data. [...]

All lenses benefit from coding in auto iso mode if shutter speed limits depend on focal length.

[1joel1]

On 1/31/2023 at 1:30 PM, lct said:

All lenses benefit from coding in auto iso mode if shutter speed limits depend on focal length.

Good point. I never use Auto ISO so I missed that.

[adan]

Uncoded longer lenses are not subject to the color problems of <50mm lenses.

But the cameras will use 6-bit coding to remove regular luminance vignetting, even with lenses as long as 135mm.

I noticed this even with the M9 on introduction day (9/9/09). A 135 used with the lens ID'd showed less wide-open vignetting than without, shooting nothing but a patch of blue sky.

Certainly not a big deal for many (including me), but a real effect.

[Qlan]

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I will attempt to code my lenses tonight. Can someone confirm the following codes are the best for the following lenses:

Voigtlander 28mm f/2 Ultron type II -> Summicron-M 28mm f/2 ASPH (model 11604 - code 011010)

Voigtlander 50mm f/2 APO Lanthar -> APO-Summicron-M 50mm f/2 (VI) (model 11141 - code 101001)

Thanks!

[Qlan]

4 hours ago, Qlan said:

I will attempt to code my lenses tonight. Can someone confirm the following codes are the best for the following lenses:

Voigtlander 28mm f/2 Ultron type II -> Summicron-M 28mm f/2 ASPH (model 11604 - code 011010)

Voigtlander 50mm f/2 APO Lanthar -> APO-Summicron-M 50mm f/2 (VI) (model 11141 - code 101001)

Thanks!

Or should I use 11672 for the 28mm (summicron ASPH v2). I guess IQ wise, the Ultron is much closer to the Summicron v2. The website is a bit outdated.

Edit: it turns out the 11604 and 11672 have the same 6-bit code: 011010. Problem solved!

Edited February 16, 2023 by Qlan

[Nimar]

How to code for a 35 Summicron APO?

I couldn’t find the answer anywhere, on here or the handful of websites with 6 bit coding lists. 

Found a picture of the back of one online its

001101

Coded my 35 APO Lanthar and enjoying the results. 

[Syrjames]

How would you recommend me (manually) setting my new

Voigtlander 35mm Nokton f1.5 lens....?

Closest is the 35mm summilux but there appear to be 3 options to choose on my M11

Thank you!

 

 

Edited June 20, 2023 by Syrjames

[lct]

1 hour ago, Syrjames said:

How would you recommend me (manually) setting my new Voigtlander 35mm Nokton f1.5 lens....? Closest is the 35mm summilux but there appear to be 3 options to choose on my M11 [...]

The Leica 6-bit code i chose for hand-coding my Nokton 35/1.4 SC v2 is 001100 corresponding to Summilux-M 1:1.4/35 (lens profile # 11869/11870/11860). Works fine for me but i don't take distortion into consideration so you may wish to compare with other lens profiles if you do.

[lct]

I realize you were asking about the Nokton 35/1.5 aspherical lens. It is a modern character lens to which i would tend to apply a 35/1.4 asph profile preferably but i have no experience with this lens sorry.

[Syrjames]

Yes, it is the modern one, beauuuutiful pice btw...

I also thought the same... And, at the end, the most important thing is to have some 'exif' data so I can later on tell which lens is lens (which I like doing everytime i suffer from GAS haha).

I will write Voigtlander and see if they can share with me their preference.

Best,

Jaime

[lct]

Interesting lens indeed i am tempted by the lightness of the aluminum version. Do you know if helicoids are aluminum too?

[iordanis]

On 6/20/2023 at 5:59 PM, lct said:

The Leica 6-bit code i chose for hand-coding my Nokton 35/1.4 SC v2 is 001100 corresponding to Summilux-M 1:1.4/35 (lens profile # 11869/11870/11860). Works fine for me but i don't take distortion into consideration so you may wish to compare with other lens profiles if you do.

That's interesting... I wanted to code my CV Nokton 35/1.4 MC Classic v2 but couldn't find the code. Should be the same I believe, so 001100 it is?

[lct]

1 hour ago, iordanis said:

That's interesting... I wanted to code my CV Nokton 35/1.4 MC Classic v2 but couldn't find the code. Should be the same I believe, so 001100 it is?

Does little harm to try but i don't have enough experience with the MC version to advise you to hand-code the lens this way or otherwise. I would keep the lens uncoded and select a lens profile through the lens detection menu to begin with.

[pegelli]

Question, what does the coding (or manually selecting a lens from the list) actually change to the DNG on a M246 monochrom  body?

I did some tests this morning using several 35 and 50 mm profiles (with Voigtländer lenses of that focal length) and I can see some differences in vignette correction between the different profiles, (with the worst vignette when the correction is disabled) but it doesn't seem to do any (barrel or pincushion) distortion correction when importing the DNG's into Lightroom.

[rramesh]

I’m using the 6bit code for the Summilux 35mm ASPH on my Nokton 35mm 1.5, and it’s fine. 

Edited July 9, 2023 by rramesh

[TomB_tx]

On 7/7/2023 at 7:26 AM, pegelli said:

Question, what does the coding (or manually selecting a lens from the list) actually change to the DNG on a M246 monochrom  body?

I did some tests this morning using several 35 and 50 mm profiles (with Voigtländer lenses of that focal length) and I can see some differences in vignette correction between the different profiles, (with the worst vignette when the correction is disabled) but it doesn't seem to do any (barrel or pincushion) distortion correction when importing the DNG's into Lightroom.

That's right - the in-camera corrections by 6-bit are for vignette and color drift at edges, and not distortion.  Reid Reviews has stressed this in the past with favor, as distortion correction often has degrading effects on IQ.

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[TAFFY]

Hi can someone share the appropriate lens code for the Voigtlander Nokton 50 1.2? 
 

Would it be that of the Noctilux 50 1.2? Thanks