Quick Coding Question

[johntobias]

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I'm using (with very nice results) an old Elmar-c 90mm f4.0  lens on my CL (with leica adapter)  what is the closest lens to code this as ?? I've acquired a new lens flange and want to code it for the adapter

 

many thanks

 

J

[wlaidlaw]

I would use the code for the 90mm Macro Elmar/f4 which is 100111 reading clockwise looking at the lens, black white white black black black. Other than giving you the lens information on the EXIF, lens codes for lenses longer than 35mm do very little. Maybe a little correction for vignetting on fast 50mm lenses but longer than that, nothing. 

 

Wilson

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[lct]

Interesting indeed. Never tried to hand code my Elmar-C. Your replacement flange has the same thickness as that of the lens hopefully. Just wondering since flanges from that period have not the same look as current ones. Does no harm to try anyway but i would keep the original flange and the (i suspect) remaining screw for sake of precaution. 

Edited June 21, 2018 by lct

[johntobias]

certainly will be if unsuccessful, replacement flanges (with the pits for self coding) are pretty cheap   thought I'd give it a try....will post my results!

[ianman]

I would use the code for the 90mm Macro Elmar/f4 which is 100111 reading clockwise looking at the lens, black white white black black black. Other than giving you the lens information on the EXIF, lens codes for lenses longer than 35mm do very little. Maybe a little correction for vignetting on fast 50mm lenses but longer than that, nothing. 

 

Wilson

Yes. And if the purpose is to have the correct info in the EXIF it's quite easy to modify. Most of my lenses are uncoded and I am always forgetting to change the info on the camera when I change lenses. But as I like to have the info, I just use exiftool to add it.

[wlaidlaw]

The best idea might be to get your existing flange milled. As you are in the UK, Malcolm Taylor in Amestrey near Leominster is probably your best best. Malcolm offers a quite quick turn around on minor jobs like coding a bit in contrast to major jobs where perfect rather than fast is his motto. Leica Germany use him for restorations on some of their most precious and rare items, like Oscar Barnack's self made movie camera which pre-dated the first still Leica. It was virtually destroyed in WW2 - he's that good! PM me if you want his contact details. He does not do email. You send him the whole lens and he does the rest. 

 

Wilson

[Jon Pop]

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I've used my 90 C f4 on my M9, 240 (when I had it), and now also M10, coded as the 90f4 11634 and it works great. The only advantage I see to coding isn't so much the retrospective EXIF data but to save me the trouble of forgetting, especially if I was last using a 28. Wlaidlaw is right about the amount of effect. Good little lens; a bit light on contrast but so incredibly inexpensive.

[Pyrogallol]

I have EXIF data for all my old screw or M lenses on any body. The recording device is called a pen and paper.

[wlaidlaw]

I have EXIF data for all my old screw or M lenses on any body. The recording device is called a pen and paper.

 

If you try that when you are on a commercial shoot and taking 400-600 photos in a day, it just does not work. I have had all the lenses coded, which I use regularly on the cameras I currently use, that employ coding (SL, CL and M240). This is so that when I change lenses, I don't forget to alter the lens code manually. In the heat of the moment, it is just too easy to forget. Even the few LTM lenses I use regularly (35/2.8 Summaron, 50/1.4 Summilux III Special Edition, 85/1.5 Summarex and 50/1.5 Summarit, all have their own coded Rayqual LTM to M adapter rings to the nearest appropriate lens. For example, I don't have a 75/f1.4 Summilux, so I know when I see that on an EXIF, it is the 85/f1.5 Summarex mounted and so on. 

 

Wilson