JohannB Posted April 13, 2013 Share #1 Posted April 13, 2013 Advertisement (gone after registration) Hi, Happened twice to me on a recent trip with my M-E and Lux 50 1.4. Sun was straight ahead at around 35 degrees and with lens hood extended I was trying to take a photo underneath the sun. Is this the reflection from the sensor onto the lens? Thank you Johann 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! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/202575-sensor-reflection/?do=findComment&comment=2298089'>More sharing options...
Advertisement Posted April 13, 2013 Posted April 13, 2013 Hi JohannB, Take a look here Sensor Reflection?. I'm sure you'll find what you were looking for!
mmradman Posted April 13, 2013 Share #2 Posted April 13, 2013 Did you say with sun ahead, there is your answer, plain flare. Nothing to worry about, anything short of absolute black body (100% absorption) will give you some level of reflection. Link to post Share on other sites More sharing options...
Lindolfi Posted April 13, 2013 Share #3 Posted April 13, 2013 Most unlikely, given the course of the light rays. But you can test it by mounting the lens on a film M, opening the back and applying a piece of transparent paper in the film location. Use a lamp as a light source in a dark room and turn the camera in its direction, rotate the camera slowly to see if you can get a lens flare of similar color and shape. If so, it is not reflection from the sensor. Link to post Share on other sites More sharing options...
otto.f Posted April 13, 2013 Share #4 Posted April 13, 2013 The hood of the asph summilux 50 is in fact too short. The separate hoods on the 50's summicron and summilux were the last really right hoods Link to post Share on other sites More sharing options...
JohannB Posted April 13, 2013 Author Share #5 Posted April 13, 2013 Bert that is a good idea for a test but I don't have a film M at my disposal for such a test. I doubt this is normal lens flare. This flare has a sharp straight edge which is quite strange for me. Johann Link to post Share on other sites More sharing options...
otto.f Posted April 13, 2013 Share #6 Posted April 13, 2013 (edited) Doesn't seem strange to me. Flare can have very awkward forms. This is not unfamiliar to me for a asph lux 50, except perhaps the color Edited April 13, 2013 by otto.f Link to post Share on other sites More sharing options...
JohannB Posted April 13, 2013 Author Share #7 Posted April 13, 2013 Advertisement (gone after registration) Thank you Otto. I'll guess I will try and make a plan with the hood. I agree that is quite short and will contribute to the problem. Johann Link to post Share on other sites More sharing options...
Lindolfi Posted April 13, 2013 Share #8 Posted April 13, 2013 Bert that is a good idea for a test but I don't have a film M at my disposal for such a test. I doubt this is normal lens flare. This flare has a sharp straight edge which is quite strange for me. Johann If you remove the lens from your camera and look onto the sensor and turn the camera slightly upward, so that it "looks" slightly over your head, you will see that the housing of the M body blocks the lower part of the sensor from stray incoming light coming from the lens. Most likely that is where your straight edge at the top of your image comes from. Since I do have the summilux 50/1.4 and an M6, I can do the experiment for you and report back. Link to post Share on other sites More sharing options...
Lindolfi Posted April 13, 2013 Share #9 Posted April 13, 2013 Have done the experiment (M6 with transparent paper) with a point light source (1000 Watt bare halogen) and can not reproduce your effect. Neither can I do it with the M9 and the Summilux. Is your Summilux 50/1.4 the ASPH or not? Link to post Share on other sites More sharing options...
JohannB Posted April 13, 2013 Author Share #10 Posted April 13, 2013 Jeepers that was quick! I have the Summilux 50/1.4 ASPH. Johann Link to post Share on other sites More sharing options...
Lindolfi Posted April 13, 2013 Share #11 Posted April 13, 2013 Now that I try to reconstruct the light rays, it may be that it comes from reflecting light on the light sensor lens in the bottom of the M body.The lens is mounted in a depression and so that may be the cause of the straight edge in the image. Link to post Share on other sites More sharing options...
Lindolfi Posted April 13, 2013 Share #12 Posted April 13, 2013 If that is the case, a simple test can be done: try to reproduce it with the camera in portrait orientation and the sun still above the frame (photographing in a direction below the sun). If you can not get this effect, it may be that the light sensor lens is the cause. 1 Link to post Share on other sites More sharing options...
JohannB Posted April 13, 2013 Author Share #13 Posted April 13, 2013 (edited) Bert thank you for taking the trouble to find the cause. What is interresting is that shooting into the sun or to the left or right didn't have any effect. It is just when I'm trying to shoot underneath the sun, sitting at around 35 degrees, that I'm getting this effect. Will give the portrait test a go. Just waiting for some sunshine again Johann Edited April 13, 2013 by JohannB Link to post Share on other sites More sharing options...
Lindolfi Posted April 13, 2013 Share #14 Posted April 13, 2013 Since lens flare is always rotational symmetric and reflections in the sensor itself also, your observation that shooting left or right from the sun does not yield the effect, but only when shooting below the sun, suggests that the light sensor lens may be the culprit. 1 Link to post Share on other sites More sharing options...
MirekE Posted April 14, 2013 Share #15 Posted April 14, 2013 No filter? Link to post Share on other sites More sharing options...
JohannB Posted April 14, 2013 Author Share #16 Posted April 14, 2013 Hi MirekE, I do use a Leica UV filter and is familiar with the flare it causes. This is unlike anything I have seen before. Other flares have soft edges this have a "hard" edge. Did find this though which seems to show what Bert was explaining: http://www.l-camera-forum.com/leica-forum/leica-m9-forum/127095-image-error-magenta-cut.html 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! 2 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/202575-sensor-reflection/?do=findComment&comment=2298514'>More sharing options...
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