khanosu Posted December 28, 2006 Share #1 Posted December 28, 2006 Advertisement (gone after registration) During Christmas day Rex and I were investigating banding that is caused by a strong light source at the edge of the frame. Today I went on a walk with my family and took my M8 with me to play around. Pointed the 28mm Summicron into the sun to make many pictures. When I came home I wondered if any of my pictures had that banding produce by the sun. Fortunately none of the pictures had that banding. Perhaps I was not able to put the sun in the sweet spot to get that banding or perhaps it is because I was using a small aperture (f8); I will do some more tests tomorrow to see if I can cause the sun to misbehave. In any case it is comforting to know that the banding might be difficult to get from the sun in real world pictures even if the sun is almost at the edge of the frame. As far as I am aware no one has reported the sun to cause this behavior. Here is one of the pictures from today (ISO 320, f8); there are others where the sun is even nearer to the edge but I like this one more. The M8 with its lenses make even snapshots like this one look good. I am really happy with the camera and lenses. The more I get familiar with this camera the more impressed I am by the flexibility and quality of its files. The best part for me is the small size of the camera and lenses; file quality is a welcome added bonus. Hope you are all enjoying your M8s despite the few issues it has. I am convinced that I have made the right decision to buy this camera. Furrukh Link to post Share on other sites More sharing options...
Advertisement Posted December 28, 2006 Posted December 28, 2006 Hi khanosu, Take a look here Sun at the edge – no banding – B&W picture. I'm sure you'll find what you were looking for!
jrc Posted December 28, 2006 Share #2 Posted December 28, 2006 I think you were not quite close enough -- I think the edge of the frame would have to actually bisect the sun. JC Link to post Share on other sites More sharing options...
khanosu Posted December 28, 2006 Author Share #3 Posted December 28, 2006 You might be right. I had a few where I was even closer on the outside edge where I should have gotten it but perhaps still not at the sweet spot. Also these are at 8f. I was going to do a more careful scan (moving the camera bit by bit) but then got distracted (my wife thought we had lost our way). In any case I will run a more careful test tomorrow. Furrukh Link to post Share on other sites More sharing options...
gravastar Posted December 28, 2006 Share #4 Posted December 28, 2006 I suspect to get the green banding the image of the light source has to fall on a column of reference pixels (if that's what's there) or circuitry that are just beyond the image edge. In the photo shown the sun is inside the frame. If the reference pixels are present they are probably protected from light by an opaque mask. It could be that due to the angle at which the light hits the sensor light is getting under the mask and causing the problem. If that's the case an experiment would be to see if the problem is worse with very wide angle lenses compared to a more telecentric design such as a 90mm. Bob. Link to post Share on other sites More sharing options...
billh Posted December 28, 2006 Share #5 Posted December 28, 2006 I have not have any issues like like this with the M8 either - this is a very beautiful and tranquil photo. Link to post Share on other sites More sharing options...
Peter41951 Posted December 28, 2006 Share #6 Posted December 28, 2006 Lovely shot with restful long shadows. Link to post Share on other sites More sharing options...
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