adli Posted March 4, 2015 Share #1 Posted March 4, 2015 Advertisement (gone after registration) Sorry if this question have been asked before. My problem is as follows. I have been using my 18mm Super-Elmar-M on my M240, but for some of the photos, the camera didn't detect the lens which were attaced to the camera. The result is that the camera did not apply the correct profile for the lens. For an 18mm lens, this obviously affects the pictures, so my question is, can the correction which was supposted to be done in camera be done in post prosessing? Are there any profiles or profiling tool available for this for the M240? Thanks, Arne Adli Link to post Share on other sites More sharing options...
Advertisement Posted March 4, 2015 Posted March 4, 2015 Hi adli, Take a look here M240 and undetected 18mm Super Elmar-M. I'm sure you'll find what you were looking for!
mmradman Posted March 4, 2015 Share #2 Posted March 4, 2015 Clean the 6-bit reader on the camera lens flange. Link to post Share on other sites More sharing options...
jaapv Posted March 4, 2015 Share #3 Posted March 4, 2015 Vignetting (which is the main problem) can be easily corrected in postprocessing, with only minimal image degradation. The camera corrections on the 18 mm lens seem to go no further than that. Link to post Share on other sites More sharing options...
adli Posted March 4, 2015 Author Share #4 Posted March 4, 2015 Clean the 6-bit reader on the camera lens flange. I did clean it as soon as I discovered the problem. The question was what to do with the files with undetected lens. Jaap, thanks. Link to post Share on other sites More sharing options...
CheshireCat Posted March 5, 2015 Share #5 Posted March 5, 2015 The question was what to do with the files with undetected lens. https://sites.google.com/site/cornerfix/ Check also the tutorials linked in that page. Link to post Share on other sites More sharing options...
jedi996sps Posted March 5, 2015 Share #6 Posted March 5, 2015 I did clean it as soon as I discovered the problem. The question was what to do with the files with undetected lens. Jaap, thanks. I get this sometimes too with my 50mm APO Cron. Have you checked that the lens is 'firmly' turned and engaged?... sounds daft i know. As i process my files in LR i apply lens correction in there. Link to post Share on other sites More sharing options...
adli Posted March 5, 2015 Author Share #7 Posted March 5, 2015 Advertisement (gone after registration) I get this sometimes too with my 50mm APO Cron. Have you checked that the lens is 'firmly' turned and engaged?... sounds daft i know.As i process my files in LR i apply lens correction in there. The problem was dust on the sensor after changing lenses on dusty roads. If you are referring to the built in lens profiles in LR, I believe they are supposed to be applied after in-camera correction? Link to post Share on other sites More sharing options...
Paulus Posted March 5, 2015 Share #8 Posted March 5, 2015 Vignetting (which is the main problem) can be easily corrected in postprocessing, with only minimal image degradation. The camera corrections on the 18 mm lens seem to go no further than that. Have you any idea Jaap if the corrections also help/work on a Zeiss ZM 4/18mm? Link to post Share on other sites More sharing options...
jedi996sps Posted March 5, 2015 Share #9 Posted March 5, 2015 The problem was dust on the sensor after changing lenses on dusty roads. If you are referring to the built in lens profiles in LR, I believe they are supposed to be applied after in-camera correction? That would be logical and is my understanding too. It can only be that the in camera profiles provide for a better image, but i wonder how much difference it makes when not using, say wide angle lenses and what exactly does the 6bit coding do?... Link to post Share on other sites More sharing options...
CheshireCat Posted March 6, 2015 Share #10 Posted March 6, 2015 That would be logical and is my understanding too. It can only be that the in camera profiles provide for a better image, but i wonder how much difference it makes when not using, say wide angle lenses and what exactly does the 6bit coding do?... Lens profiles in Lightroom correct lens geometric distortion and lens natural vignetting. They do not correct sensor vignetting (aka color vignetting). If you do not want to use Cornerfix, the alternative is the "Adobe DNG Flat Field plug-in" for Lightroom, downloadable here: Plug-ins for Adobe Photoshop Lightroom | Adobe Labs Link to post Share on other sites More sharing options...
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