travis2 Posted May 10, 2002 Author Share Posted May 10, 2002 Michael, say its the processing. But its on the negs. So the developing is at fault too? Link to comment Share on other sites More sharing options...
michael_darnton1 Posted May 10, 2002 Share Posted May 10, 2002 Unless it's crud on the metal edges of the shutter opening. Without film, shoot a frame, and then wind the shutter halfway and look from both the inside and outside at the edge of the metal cap on each curtain and see if there's somekind of crud buildup on the edge (the edge that doesn't clamp the fabric) of either cap. You're looking for something that would change the straight edge into a slightly toothed one. Based on your photos, I'd pay special attention to the edges towards the bottom of the camera. Link to comment Share on other sites More sharing options...
randy_samos1 Posted May 10, 2002 Share Posted May 10, 2002 Michael - <p> Excelent description of the Leica shutter travel. Thanks. <p> This <i>could</i> still be caused by an uneven shutter edge. Instead of thinking in terms of the shutter traveling at differing speeds, what would happen if there were a few "bumps" right on the edge of one or both curtain edges? That would make the slit (consistantly) narrower right where the "bumps" were, causing streaks in the direction Travis saw them. <p> Once again - a disclaimer - I've NO idea as to whether or not a Leica shutter could exhibit a problem like this one. Can it even get a "bump" or uneven machining on the edge of a shutter curtain? <p> /r Link to comment Share on other sites More sharing options...
luther_berry Posted May 10, 2002 Share Posted May 10, 2002 Travis, <p> There appear to be vertical strips of inconsistent image density across the full picture from top to bottom. Is it just the digitizing or do these vertical strips of uneven image density appear on the actual prints and/or negatives also? You did say this shot was composed vertically didn't you? Then these "problems" appear lengthwise on the film. Are they apparent on ALL shots from this roll? <p> Glad you solved the problem by exchanging the camera BUT someone else may inherit the problem now. Good shooting. LB Link to comment Share on other sites More sharing options...
sait_akkirman Posted May 10, 2002 Share Posted May 10, 2002 Travis, I know exactly what the problem is, because I have had it too in exactly the same place. It happens when the edge of one of the blinds (the metal strips) is not absolutely straight and smooth up and down. It happens mainly at 1/1000 and sometimes at 1/500 depending on subject matter. At 1/1000 the shutter slit is very narrow, and where there is any imperfection on the metal edges (e,g. like a pimple sticking out) that spot causes slightly less exposure at that height on the film. As the shutter travels across the film this manifests it self as a darker (less exposed) strip on the film. At slower speeds the shutter slit is wider, so the proportion of the "pimple" to the size of the slit is much smaller, so it does not show itself as an exposure difference. The fact that streaks are strong on one side and they dissapear towards the other is because your slit is uneven from left to right. I f you make tests you will probably find that at 1/1000 one side of your frame is darker than the other side due to unequal shutter blind travek speeds. If all this does not make sense, get in touch with me. Link to comment Share on other sites More sharing options...
travis2 Posted May 11, 2002 Author Share Posted May 11, 2002 Sait, thx for the info. But it still doesn't (I think) explain the pattern of streaks, which is running the LENGTH of the negative and not perpendicular to it, as would happen if it is a shutter slit problem. <p> Anyway, noone in my area knows why the problem arise, and of cos how to solve it. <p> Camera is TRADED. Life goes on. My bessa R has no such shutter problems. But hey, its also not 50 years old ;) <p> Thanks guys for all the input. Greatly appreaciate it. ;) Link to comment Share on other sites More sharing options...
travis2 Posted May 11, 2002 Author Share Posted May 11, 2002 Just to clarify that I understood what Michael, Randy and Sait said. <p> I believe that if there is a BUMP on the upper shutter edge of one of the curtain cloth, then as the shutter slit travels across the film, the track of streaks will be formed in line with where the BUMP spot is, BECOS LIGHT WILL BE BLOCKED. aM i RIGHT? <p> SO, according to my pics, I think there are a FEW BUMPS on the upper edge. <p> I hope i know what I just said!;)) Link to comment Share on other sites More sharing options...
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