leicavkk Posted December 6, 2009 Share #1 Posted December 6, 2009 Advertisement (gone after registration) Hi folks, I just got an M8 and also got a 75mm summarit lens. This photo from the lens is bothering me a bit. I am still waiting for my UVIR filters to arrive. But from what I've read, this does not seem to be the UVIR issue which is primarily about a magneta cast to black clothing. This seems like a purple fringing issue. I don't know enough about what causes the magneta problem to know if these are related. However, I've NEVER seen a lens do this. Any input would be appreciated. Attached the photo and a 100% crop. Also, I had looked at Sean Reids review of the lens before purchasing, and now that I look again, notice that the chromatic aberration portion of the review is missing. Link to post Share on other sites More sharing options...
Advertisement Posted December 6, 2009 Posted December 6, 2009 Hi leicavkk, Take a look here 75mm Summarit problem?. I'm sure you'll find what you were looking for!
pgk Posted December 6, 2009 Share #2 Posted December 6, 2009 Its the result of shooting extreme highlights and has been covered elsewhere in this forum (its not chromatic aberration). If its any comfort I have photos with precisely the same problem off M8 & 90/2.8 Elmarit and Canon 5D2 & 85/1.2L. You can deal with it by selecting the area affected and de-saturating the magenta - not ideal but it does work! Link to post Share on other sites More sharing options...
leicavkk Posted December 6, 2009 Author Share #3 Posted December 6, 2009 Its the result of shooting extreme highlights and has been covered elsewhere in this forum (its not chromatic aberration). If its any comfort I have photos with precisely the same problem off M8 & 90/2.8 Elmarit and Canon 5D2 & 85/1.2L. You can deal with it by selecting the area affected and de-saturating the magenta - not ideal but it does work! Thanks for the info ( I'll try and find the other thread - unless you have a pointer ). So it is an issue with the sensor? Link to post Share on other sites More sharing options...
wda Posted December 7, 2009 Share #4 Posted December 7, 2009 I have never experienced this phenomenon. Are you sure it is not reflecting that colour from objects out of frame? Link to post Share on other sites More sharing options...
leicavkk Posted December 7, 2009 Author Share #5 Posted December 7, 2009 Hello, I got an answer from the RF forum which made a lot of sense. It's from color interpolation during RAW conversion of the Bayer patterned image from the sensor because of extreme color contrast between two adjacent pixels. This is exacerbated by sharp lenses and sensors which is the case for an M8 and a really sharp lens such as this one. So, if anything, it's paradoxically a testament to the sharpness of the lens and the cameras output. Link to post Share on other sites More sharing options...
pgk Posted December 7, 2009 Share #6 Posted December 7, 2009 Here are some examples from Canon 5D2 (waterfall) and Leica M8 (dolphin). Link to post Share on other sites More sharing options...
leicavkk Posted December 7, 2009 Author Share #7 Posted December 7, 2009 Advertisement (gone after registration) Here are some examples from Canon 5D2 (waterfall) and Leica M8 (dolphin). Thanks - that's helpful Link to post Share on other sites More sharing options...
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