Big John Posted April 9, 2017 Share #1 Posted April 9, 2017 Advertisement (gone after registration) Hi all, Have seen from time to time that DNG files show marked vignetting - indeed the corners of the frame are all backed out. JPEGs are fine so I assume corrected by in-camera software. Just keen to understand this a bit more pls. What causes it, why only occasional? Thanks. Quote Link to post Share on other sites More sharing options...
LD_50 Posted April 9, 2017 Share #2 Posted April 9, 2017 (edited) Aperture, focal length, lens used, more/less noticeable subject matter. Vignetting is a property of the lens (for a given sensor size). Edited April 9, 2017 by LD_50 Quote Link to post Share on other sites More sharing options...
pico Posted April 9, 2017 Share #3 Posted April 9, 2017 (edited) Have seen from time to time that DNG files show marked vignetting - indeed the corners of the frame are all backed out. How are you viewing the DNG files? . Edited April 9, 2017 by pico Quote Link to post Share on other sites More sharing options...
250swb Posted April 10, 2017 Share #4 Posted April 10, 2017 Yes, in camera corrections sort the vignetting out with a JPEG, but you must be viewing the dng files with corrections turned off. So you need to find some buttons to press in your software. Quote Link to post Share on other sites More sharing options...
ramarren Posted April 10, 2017 Share #5 Posted April 10, 2017 When shooting with the shortest focal lengths and the SL24-90, when viewing raw files with a raw converter that does not support the lens corrections, the lens will be seen to have a noticeable amount of barrel distortion and the corners are quite dark. The lens correction parameters injected into the raw file correct these flaws with compatible raw converters automatically (like Lightroom and the Camera Raw plugin in Photoshop). The lens was designed to image this way in order to give the best performance, balancing the optical design with image processing. The marked 24mm is actually a bit shorter than that optically so that the corrections net a full, proper 24mm FoV. Quote Link to post Share on other sites More sharing options...
Big John Posted April 10, 2017 Author Share #6 Posted April 10, 2017 How are you viewing the DNG files? . Yes, in camera corrections sort the vignetting out with a JPEG, but you must be viewing the dng files with corrections turned off. So you need to find some buttons to press in your software. When shooting with the shortest focal lengths and the SL24-90, when viewing raw files with a raw converter that does not support the lens corrections, the lens will be seen to have a noticeable amount of barrel distortion and the corners are quite dark. The lens correction parameters injected into the raw file correct these flaws with compatible raw converters automatically (like Lightroom and the Camera Raw plugin in Photoshop). The lens was designed to image this way in order to give the best performance, balancing the optical design with image processing. The marked 24mm is actually a bit shorter than that optically so that the corrections net a full, proper 24mm FoV. Many thanks everyone. I tend to use Google Picassa for initial download of files then play in LR. So I see the vignetting in DNG files viewed in Picassa. I know.....bet I am only person here using Picassa for viewing Leica SL files Hello guest! Please register or sign in to view the hidden content. Hallo Gast! Du willst die Bilder sehen? Einfach registrieren oder anmelden! The explanations above make sense to me, thanks all. Quote Link to post Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.