borowiec Posted July 27, 2009 Share #1 Posted July 27, 2009 Advertisement (gone after registration) I just got an IR cut filter for my 1970s 28 Elmarit. The lens isn't coded and I don't have time to jury-rig coding with paint or markers before a shoot tomorrow. Will I be better off setting the camera to Lens Detection Off or to On + UV / IR? At first glance, looking at some test shots, it seems that the cyan cast is less noticeable with it set to On + UV / IR. Does that make sense? Thanks! Andrew Borowiec Link to post Share on other sites More sharing options...
Advertisement Posted July 27, 2009 Posted July 27, 2009 Hi borowiec, Take a look here Without coding, with IR filter: lens detection on or off?. I'm sure you'll find what you were looking for!
Shootist Posted July 27, 2009 Share #2 Posted July 27, 2009 Yes it makes sense. All you need is 1-2 or 3 black marks on the flang in the right place for the coding to work. You have all night so give it a try. Link to post Share on other sites More sharing options...
wda Posted July 27, 2009 Share #3 Posted July 27, 2009 Coding causes the camera firmware to recognize lens type and filter. Without coding I doubt you will reap the benefit of selecting lens recognition 'on'. Otherwise I am sure Leica would have offered that as a menu option. Link to post Share on other sites More sharing options...
luigi bertolotti Posted July 27, 2009 Share #4 Posted July 27, 2009 Personally, I didn't notice any difference with my uncoded Elmarit 28 setting OFF or ON+UVIR... but it was easy to self code it when I used the published coding mask. Link to post Share on other sites More sharing options...
don_panko Posted July 28, 2009 Share #5 Posted July 28, 2009 I leave detection off with uncoded lenses and get good results. The IR filter is what you really can't do without. Link to post Share on other sites More sharing options...
lars_bergquist Posted July 28, 2009 Share #6 Posted July 28, 2009 With any lens shorter than 50mm you do need coding to counteract the cyan shift that the filter produces around the edges and in the corners. There's no way around that. Rube Goldberg/Heath Robinson software procedures are no real answer. And the camera must be set to 'ON + UV/IR'. With the longer lenses, you can leave the setting as above. Without any coding input, the camera will apply a generic, slight correction that is realy aimed at the weak internal filter. I have seen no problem here. The old man from the Age of Infra-Red Film Link to post Share on other sites More sharing options...
borowiec Posted July 28, 2009 Author Share #7 Posted July 28, 2009 Advertisement (gone after registration) Well, given the preponderance of opinion, I decided to attempt coding. However, I can find codes for the 3rd and 4th generation 28 Elmarits as well as the current ASPH lens, but none for mine (2nd. generation). And all three of those are different, so which should I use? Mine is also not on the list of lenses that Leitz says can be sent to them for coding Andrew Borowiec Link to post Share on other sites More sharing options...
haroldp Posted July 28, 2009 Share #8 Posted July 28, 2009 If you shoot Raw, the lens info is in the exif data but nothing is done in camera . It is up to the raw processor to apply specific corrections (or not ). Regards ... Harold Link to post Share on other sites More sharing options...
jaapv Posted July 28, 2009 Share #9 Posted July 28, 2009 You are mistaken, Harold. If a lens is coded the vignetting and (if UV/IR is selected) cyan drift corrections are made in the camera before the DNG is written. Link to post Share on other sites More sharing options...
Ecar Posted July 28, 2009 Share #10 Posted July 28, 2009 If you shoot Raw, the lens info is in the exif data but nothing is done in camera . It is up to the raw processor to apply specific corrections (or not ). Regards ... Harold Well... Actually, with lens correction set to On + UV/IR the vignetting and cyan corrections ARE applied to the dng raw file... Link to post Share on other sites More sharing options...
Ecar Posted July 28, 2009 Share #11 Posted July 28, 2009 You are mistaken, Harold. If a lens is coded the vignetting and (if UV/IR is selected) cyan drift corrections are made in the camera before the DNG is written. Jaap was faster than me... Link to post Share on other sites More sharing options...
luigi bertolotti Posted July 28, 2009 Share #12 Posted July 28, 2009 Well, given the preponderance of opinion, I decided to attempt coding. However, I can find codes for the 3rd and 4th generation 28 Elmarits as well as the current ASPH lens, but none for mine (2nd. generation). And all three of those are different, so which should I use? Mine is also not on the list of lenses that Leitz says can be sent to them for codingAndrew Borowiec Mine too was uncodable by Leica... I think for the mount has a screw along the "bit strip" and this is an "unsupported codable configuration" in Leica view (not wrong, milling CANNOT be done); but painted DIY coding works, and you can use Elmarit 28 3rd generation code (is one of the easiest... 000011 - a big black point acts as two...) Link to post Share on other sites More sharing options...
wda Posted July 28, 2009 Share #13 Posted July 28, 2009 Well... Actually, with lens correction set to On + UV/IR the vignetting and cyan corrections ARE applied to the dng raw file... ... provided the lens is coded. Link to post Share on other sites More sharing options...
khiromu Posted July 28, 2009 Share #14 Posted July 28, 2009 Maybe my expectation is too low, but uncoded lenses wider than 35mm works perfectly fine unless I am shooting white wall or blue sky... I don't shoot those things often, so I don't see much problem on my images without coding... But I do use UV/IR cut filters on every lens I use. Link to post Share on other sites More sharing options...
haroldp Posted July 28, 2009 Share #15 Posted July 28, 2009 I stand corrected and have learned something useful. Thank you. Link to post Share on other sites More sharing options...
hoppyman Posted July 29, 2009 Share #16 Posted July 29, 2009 Jaap is correct, of course. To amplify that, if the new DNG 1.3.0.0 standard is implemented, in the future it is possible we may have the option to adjust those corrections and others after the fact as they will move from the firmware to the converter. Should be good news for camera DNG processing time too. You are mistaken, Harold. If a lens is coded the vignetting and (if UV/IR is selected) cyan drift corrections are made in the camera before the DNG is written. Link to post Share on other sites More sharing options...
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