AAK Posted April 22, 2016 Share #1 Posted April 22, 2016 Advertisement (gone after registration) I was shooting on a bright beach in strong sunlight using a Yellow K2 filter on my Summilux 50 f/1.4 Asph. with M-A camera. A few shots on the roll have the streak of fogging visible here, always in the same location and the same size. The shots were all at f/11. I extended the lens hood for all shots. The streak is not on the rebate (sprocket) edge of the film, so it doesn't seem to be coming from the back of the camera. Being on the bottom of the image, if it were a light leak, then it would have to be coming in from the top of the camera, which is obviously solid, so that seems unlikely. That leaves some light coming in from the lens. The only thing I can think of is some internal reflection possibly originating from the filter in intense sunlight. I believe the filter is not coated. Does it look like a reflection? I suppose I could take some shots into the sun with and without the filter to see. If it's a reflection, it could also be originating in the bright sand as well. Would welcome suggestions! 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/259590-is-this-a-filter-reflection/?do=findComment&comment=3031396'>More sharing options...
Advertisement Posted April 22, 2016 Posted April 22, 2016 Hi AAK, Take a look here Is this a filter reflection?. I'm sure you'll find what you were looking for!
david strachan Posted April 22, 2016 Share #2 Posted April 22, 2016 The cyclists shadow shows you are shooting straight toward the sun. To me it looks like a reflection off the lens filter or shade. I would expect it to change shape/angle as the incident sun angle changes. But you say it stays the same, on several frames. There'll be more ideas soon. cheers Dave S Link to post Share on other sites More sharing options...
Leicanerd Posted April 22, 2016 Share #3 Posted April 22, 2016 I believe that it is a reflection of the sun from the lower inside of the lens hood. Under this particular angle of the sun, it would have been better to do without the lens hood. But one does not realize that beforehand.Best,Ludwig Link to post Share on other sites More sharing options...
AAK Posted April 22, 2016 Author Share #4 Posted April 22, 2016 Now I'm wondering if there was something refractive like a grain of sand on the front filter and that the fog streak would appear as a color spectrum if I had used color film. It fades as it goes up but has sharp left and right edges. Here are two other shots taken in order after the one in my first post above. One shows basically the same angle of view as the shot in the first post but without the streak, and the second shows a view taken at 90 degrees to the first post, with a fainter version of the streak. All of these were taken within 30 minutes of each other (including the first one), on the same roll of film. I'm puzzled by this. I'll shoot some color film this weekend and experiment, although I've cleaned the front filter since I took these so it may not be reproducible. 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/259590-is-this-a-filter-reflection/?do=findComment&comment=3031575'>More sharing options...
pop Posted April 22, 2016 Share #5 Posted April 22, 2016 It would be too much of a coincidence if you happened to get the reflections off something in front of the lens in the same shape and location. Also, the bright artefact is too sharply delineated for that to be a likely cause. I think the most likely cause would be a light leak in the camera body, even if you can not imagine where the leak could occur. It could occur in the place where the frame is exposed, but it also could be anyplace else within the path the film takes in the camera. Link to post Share on other sites More sharing options...
TomB_tx Posted April 23, 2016 Share #6 Posted April 23, 2016 Since it is only in the frame area, not the film edges, it must be coming through the frame gate. It's brightest at the edge, fading away from the edge. If it varies depending on how long the frame is left behind the shutter before winding (and in bright light) it sounds like the light seals at the curtain edges. Test by leaving the lens open wide for quite a while in bright light before taking a shot,then cap the lens to take a blank shot and immediately advance the film. Then immediately take another blank shot with the lens capped, remove the cap and leave that frame in place for some time in bright light. This will tell you if it is coming past the 1st or 2nd curtain, or both. Oh, and don't point the wide open lens at the sun while testing, or you will have more light leaks! Link to post Share on other sites More sharing options...
erl Posted April 23, 2016 Share #7 Posted April 23, 2016 Advertisement (gone after registration) Look inside the body through the lens mount to see if a light baffle is loose, or maybe a bit of film or other detritus is jammed inside the body. that would explain the identical position of the streak. I had a similar thing occur with a Hasselblad. Once I found the loose object, I removed it and all was OK. Link to post Share on other sites More sharing options...
AAK Posted April 23, 2016 Author Share #8 Posted April 23, 2016 Thanks to all for you help and ideas. If it's a light leak near the seals, wouldn't it be more diffuse, semicircular and less linear? Link to post Share on other sites More sharing options...
250swb Posted April 23, 2016 Share #9 Posted April 23, 2016 It is a light leak coming in from above the film gate (the image is projected upside down in the camera). Steve Link to post Share on other sites More sharing options...
wattsy Posted April 23, 2016 Share #10 Posted April 23, 2016 Leica didn't sell you my first (and replaced) M-A I hope? Link to post Share on other sites More sharing options...
AAK Posted April 23, 2016 Author Share #11 Posted April 23, 2016 I hope not! I'm going to test a roll of film today under different conditions. Should know more by early next week. I looked carefully around the frame with a penlight in a dark room. I cannot see any light leak or any debris. It's covered by the Passport warranty for another 2.5 years if needed. Link to post Share on other sites More sharing options...
wattsy Posted April 23, 2016 Share #12 Posted April 23, 2016 I hope not! I'm going to test a roll of film today under different conditions. Should know more by early next week. I looked carefully around the frame with a penlight in a dark room. I cannot see any light leak or any debris. It's covered by the Passport warranty for another 2.5 years if needed. I was only joking – my light leak was consistently from the top (as you look at the photograph). I spent ages using a torch in a darkened room trying to find the leak and couldn't find it. The camera first showed the leak after about a month or so of ownership and was fairly intermittent and unpredictable (occurring roughly once per 2/3 rolls averaged out). I put up with it for about five months before approaching Leica. A little to my dismay there was no real appetite on their part to fix the problem (which, if it could have been done in a reasonable time period, I would have preferred). Instead, the Leica Mayfair shop replaced the camera with a new one. Link to post Share on other sites More sharing options...
AAK Posted April 26, 2016 Author Share #13 Posted April 26, 2016 Follow up: I took some exposures with and without the hood, the filter, and even the lens attached. No sign of this artifact. Even with the lens removed and just holding the camera body turned to the sun, there is no light leak at all. And I experimented on a sunny day. I suppose it may be the area around the lens flange and needs the sun to hit it at a particular angle although it's present in shots taken in different directions. Is there any way this could have arisen during processing at the lab? Link to post Share on other sites More sharing options...
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