carstenw Posted November 30, 2006 Share #161 Posted November 30, 2006 Advertisement (gone after registration) O-Tay, I'm going to add a whole section on this to the review of the 28 mm lenses but what I'd like to refer people to is a page with pictures of the various coded lenses (obviously looking down at the mount). I think those are even more useful (and possibly more fool-proof) than the number lists. Does this exist already or does it need to be made? If the latter, who is willing about to contribute pictures (let's say 300 x 300 pixels each)? Cheers, Sean Hey Buckwheat, I have several pictures of the codes, and will add them to the table. They could even be generated, as long as they show a little curvature to help the people who are less numerically oriented. All contributions in the form of lens code pics are appreciated. Link to post Share on other sites More sharing options...
Advertisement Posted November 30, 2006 Posted November 30, 2006 Hi carstenw, Take a look here Proof of concept regarding self coding of lenses. I'm sure you'll find what you were looking for!
brucek Posted November 30, 2006 Share #162 Posted November 30, 2006 I've been trying to code for the new T-E, apparently code 16 but I've also tried 47, nothing. I'm wondering whether the current firmware knows about this lens. Anyone else tried it? Mark: Could it be affected by the position of the frame selector as well as the coding marks? What is the Frame selector set to when you've tried this? Bruce Link to post Share on other sites More sharing options...
marknorton Posted November 30, 2006 Share #163 Posted November 30, 2006 Bruce, good point, and I don't know which of the 3 frame sets is selected when the lens is mounted. Changing the frame lever position didn't make any difference, so it's a bit of a mystery! Link to post Share on other sites More sharing options...
marknorton Posted November 30, 2006 Share #164 Posted November 30, 2006 Hey Buckwheat, I have several pictures of the codes, and will add them to the table. They could even be generated, as long as they show a little curvature to help the people who are less numerically oriented. All contributions in the form of lens code pics are appreciated. Carsten There are pictures of the backs of my lenses here: http://www.leica-camera-user.com/digital-forum/10173-do-yourself-lens-coding.html#post103279 You're welcome to use them; if you'd like the originals, let me know. Link to post Share on other sites More sharing options...
brucek Posted November 30, 2006 Share #165 Posted November 30, 2006 Bruce, good point, and I don't know which of the 3 frame sets is selected when the lens is mounted. Changing the frame lever position didn't make any difference, so it's a bit of a mystery! Mark: Did you just try changing the position of the lever while the camera was still powered on or did you change the position and then turn on the camera? I'm wondering if the lens might only be recognized if the lever is in a particular position when the camera is powered on. The same would hold true if the lens were swapped while power was on, I would think. Bruce Link to post Share on other sites More sharing options...
marknorton Posted November 30, 2006 Share #166 Posted November 30, 2006 Bruce, looks like the lens is "read" at each exposure. There's no requirement to power off the camera before changing lenses. Link to post Share on other sites More sharing options...
mike prevette Posted November 30, 2006 Author Share #167 Posted November 30, 2006 Advertisement (gone after registration) I can confirm that Mark. Link to post Share on other sites More sharing options...
carstenw Posted November 30, 2006 Share #168 Posted November 30, 2006 Another update. Too many people to thank: - "Last update" time added. - 35 Elmarit problem fixed. - Images of lens codes added, for those I have. Please send more, and improved ones for the hard-to-see ones. In fact, none of these belong to me, so I would love replacements for them all. I would be very happy if all the pictures were as easy to read as the one for the Elmarit-M 28mm f/2.8 ASPH. - Removal of ? for Apo-75 chrome version. Link to post Share on other sites More sharing options...
carstenw Posted November 30, 2006 Share #169 Posted November 30, 2006 It is all so utterly simple. It seems impossible that Leica didn't thought of that before ( I mean users painting their codes on lenses instead of sending it to Solms ) Anyway I see the little CV ultrawides ( Cv12 and CV15) are left out of the game for the time being, no codes for them. I wonder if the Trielmar 16-18-21 code would be a feasible solution at least fo the CV15.. My CV15 is about to get a sex-change and become a Tri-Elmar 16-18-21 As soon as my M8 returns and my CV15 arrives... Any day now... Link to post Share on other sites More sharing options...
carstenw Posted November 30, 2006 Share #170 Posted November 30, 2006 this whole coding system is bunk anyway. Any correction system that doesn't take into account shooting aperture can cause more harm than good. Imagine shooting with a lens that the firmware corrects for 1 stop of vignetting, at f8 when the lens renders no noticable vignetting. The camera wil still automaticly correct for it, and to your RAW data none the less. Thats unacceptable. Yes, but we do have one thing going for us: the codes are for Leica lenses, and Leica lenses probably are most likely of any brand to have minimal artifical vignetting, ie. vignetting introduced by the lens design rather than the cos^4 rule. Practically, this means that the camera will subtract a minimum, which should help even inferior lenses. Link to post Share on other sites More sharing options...
carstenw Posted November 30, 2006 Share #171 Posted November 30, 2006 Carsten There are pictures of the backs of my lenses here: http://www.leica-camera-user.com/digital-forum/10173-do-yourself-lens-coding.html#post103279 You're welcome to use them; if you'd like the originals, let me know. See, I already stole those ones Okay, that means that half of the ones I stole I don't need to return. The other half belongs to Popflash. Link to post Share on other sites More sharing options...
robsteve Posted November 30, 2006 Share #172 Posted November 30, 2006 The Noctilux is going to be easy to code. One white then all black 0XXXXX. Just starting at space two, you can color it all black. Link to post Share on other sites More sharing options...
baloo Posted December 1, 2006 Share #173 Posted December 1, 2006 Sean I'd be curious if the 16-18-21 TE lens coding would work well with the 15mm Heliar. It might make a pretty good match especially with regards the radial cyan issue. You have both of those lenses, don't you? And a sharpies? Rex Hi Rex, I’ve got the 15mm Heliar and try the coding 0X0000 but it didn’t work and try with a sharpie and white and the box doesn’t see the lens... steve Link to post Share on other sites More sharing options...
mike prevette Posted December 1, 2006 Author Share #174 Posted December 1, 2006 Even I am having trouble getting some lenses to work. Funny thing is the leica lenses seem the hardest to get to work. My 135mm Elmarit just will not work. It's tricky business with fat fingers and a coffee powered hand. I am going to code my 15mm VC but I'm still not sure what code to use. Any one know what lens has the closest exit pupil length? The screw mount lenses are a challenge with that 1mm gap right where the sensor is. If at first you don't succeed, try try again _mike Link to post Share on other sites More sharing options...
osera Posted December 1, 2006 Share #175 Posted December 1, 2006 The Noctilux is going to be easy to code. One white then all black 0XXXXX. Just starting at space two, you can color it all black. Exactly right, Rob. One long black blob. And it works. At least it indicates the lens as 50mm. (One has to fill in the screw there with the black ink.) Link to post Share on other sites More sharing options...
sean_reid Posted December 1, 2006 Share #176 Posted December 1, 2006 Hey Buckwheat, I have several pictures of the codes, and will add them to the table. They could even be generated, as long as they show a little curvature to help the people who are less numerically oriented. All contributions in the form of lens code pics are appreciated. Hiya, That's coming along very well. I don't know about you, but when I mark the lenses, I have notches cut in my plastic template and so I work with the "coding" area closest to me. If that's the way that many are working, it might be helpful to flip those pictures over and also allow them to be clicked to larger versions. Best, Sean Link to post Share on other sites More sharing options...
sean_reid Posted December 1, 2006 Share #177 Posted December 1, 2006 Yes, but we do have one thing going for us: the codes are for Leica lenses, and Leica lenses probably are most likely of any brand to have minimal artifical vignetting, ie. vignetting introduced by the lens design rather than the cos^4 rule. Practically, this means that the camera will subtract a minimum, which should help even inferior lenses. About those "inferior" lenses... The CV 28/1.9 Ultron shows less vignetting at wide apertures than either the asph. 28 Summicron or the asph. 28 Elmarit (based on real tests). As such, the vignetting correction for the Summicron may slightly over-correct the Ultron. There are other examples but I'd urge us to make coding associations based on actual information rather than any preconceptions (that is, if we want them to be useful). Demonstrated performance can sometimes differ from the myths. I'm going to keep demonstrating actual performance in lens reviews and hopefully people will get a better sense of these other lenses. Thanks for all your work on the coding page Carsten. Cheers, Sean Link to post Share on other sites More sharing options...
sean_reid Posted December 1, 2006 Share #178 Posted December 1, 2006 Just successfully coded a Zeiss ZM 28/2.8 as a 28 Summicron Asph (best potential match based on my tests for the review of the 28s). The Zeiss lenses are tricky because there's a screw hole right where some of the coding needs to go. OK, just coded the Zeiss ZM 35/2.0 as well (based on Summicron 35/2.0. So far, I've gotten those two Zeiss lenses and the CV 35/2.5 Pancake II to work. The Zeiss 25 and 21 are going to be more difficult. The Zeiss 25 brings up the 28 frameline right now so to get the right coding and frame line one would need to hold the preview lever in place. That's fine for tests but, of course, is no good for real life. The Leica 24, of course, brings up the 24 frame lines because it keys like a 35/135. The 21 Elmarit brings up the 28-90 frame lines whereas the 21 Zeiss brings up the 50/75 frame lines so, once again, holding the preview lever will be fine for tests but no good for real life. Cheers, Sean Link to post Share on other sites More sharing options...
mike prevette Posted December 1, 2006 Author Share #179 Posted December 1, 2006 Just coded my vc 15 as a 21mm f/2.8 ASPH using a thin piece of balsa. Not very useful IMHO. I see no vignette reductions. Not the right lens for its cameo. *edit- Ok did a more hardcore test and I do see an improvement in the vignetting, not a big change but it's something. _mike Link to post Share on other sites More sharing options...
marknorton Posted December 1, 2006 Share #180 Posted December 1, 2006 The Zeiss 25 and 21 are going to be more difficult. The Zeiss 25 brings up the 28 frameline right now so to get the right coding and frame line one would need to hold the preview lever in place. That's fine for tests but, of course, is no good for real life. The Leica 24, of course, brings up the 24 frame lines because it keys like a 35/135. The 21 Elmarit brings up the 28-90 frame lines whereas the 21 Zeiss brings up the 50/75 frame lines so, once again, holding the preview lever will be fine for tests but no good for real life. Hopefully, if this work shows an image quality improvement with the Zeiss lenses, they may be persuaded to change the lens mount to bring up the correct frame lines. It would be interesting to know if Zeiss are watching this thread. Thanks to Mike and Carsten for their great contribution. Still can't get the 16-18-21 to work... but my pen is running out so the dots may not be dense enough. Link to post Share on other sites More sharing options...
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