mjh Posted February 27, 2010 Share #21 Posted February 27, 2010 Advertisement (gone after registration) A magenta cast can be eliminated easily as long as there is no real magenta in the image, but IR contamination can cause any color to shift, not just black. Grass and leaves can appear yellowish/brownish for example, and there is no universally applicable solution to correct for this color shift. Link to post Share on other sites More sharing options...
Advertisement Posted February 27, 2010 Posted February 27, 2010 Hi mjh, Take a look here Grrr... What is THIS?!. I'm sure you'll find what you were looking for!
bedaberger Posted March 3, 2010 Share #22 Posted March 3, 2010 It is definitely the filter. This isn’t lens flare but a fairly typical example of ghost images. Ghost images are created by light reflected off the sensor and then again by the filter. This kind of reflection needs a planar surface such as a filter, and it needs a sensor rather than the more diffuse reflection off a film emulsion. Ghost images are easily recognized as they are horizontal and vertical mirror images of the original highlights. A line connecting the originating light source to its ghost will cross the center of the image: Hello Michael! You're right, but it could not only be the filter: The CV 35/1.4 has one planar surface in the 7th lens element. As Eddie mentioned it is the S.C. version with classic coating, -> more reflections. This surface could reflect the light initially reflected from the sensor back to the sensor. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Eddie, could you make testshots with/without filter and give feedback? best regards, Peter Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! Eddie, could you make testshots with/without filter and give feedback? best regards, Peter ' data-webShareUrl='https://www.l-camera-forum.com/topic/113534-grrr-what-is-this/?do=findComment&comment=1245890'>More sharing options...
jaapv Posted March 3, 2010 Share #23 Posted March 3, 2010 No, it cannot be that - the color of the reflection is specific for an IR filter. Link to post Share on other sites More sharing options...
bedaberger Posted March 3, 2010 Share #24 Posted March 3, 2010 No, it cannot be that - the color of the reflection is specific for an IR filter. the cover glass is also an IR-cut, and the sensor itself reflects also greenish... testshots would be interesting. Some time ago Canon advertisted their new lenses to be better than the older ones, because of better coating against ghosting in digital use. a picture in the book "EF lens work III" had also shown green ghosts. Link to post Share on other sites More sharing options...
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