Archived posting to the Leica Users Group, 2003/11/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Here are the pictures. They are titled "ShutterProb" only because that's what I initially thought the issue was. http://www2.2alpha.com/~pklein/tofino/1-31ShutterProb.jpg http://www2.2alpha.com/~pklein/tofino/2-31ShutterProb.jpg http://www2.2alpha.com/~pklein/tofino/3-31ShutterProb.jpg - --Peter At 03:02 PM 11/24/03 -0800, I wrote: >Folks: Simon's drying marks on his negs reminded me of a mysterious >problem I had recently. It happened on three successive rolls of color >neg film (1 of Supra 400, two of Reala 100), all shot in the same M6TTL, >and processed together at the same lab. > >On each roll, on frame #31 and *only* frame #31, the right half >(approximately) of each print was significantly darker than the left half, >with a distinct boundary. The brighter half (left) looked correctly >exposed, the darker half (right) looked underexposed. The boundary between >the bright and dark areas was a vertical line, not exactly straight, but >nearly so. All three defective frames were probably *not* taken at the >same shutter speed, which could have been anywhere between 1/60 and 1/500. >The unevenness appears on the negatives, too. > >I suspected a shutter problem. But when I talked to Sherry about it, she >said that she didn't see how such a thing could be related to a frame >number. If all or most pictures taken at a particular shutter speed were >uneven, that would indicate a shutter problem. > >Since then I've shot several rolls, and the problem has not recurred. >I've used both the lab where the three problem rolls were developed, and >another. No more uneven frames. > >I'm beginning to wonder if the processing is at fault. The only three >things in common are the camera, the lab, and the time of processing. - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html