Rob Studdert wrote: > I was reviewing a set of 35mm B&W negs that I just cut a sleeved and > on one frame I noticed a strange aberration. The left hand side of the > image has a distinct double exposure effect there are two copies of the > image with a horizontal offset. Looking across the frame the difference > between the images becomes less until at about 2/3 across is > disappears completely and the neg appears sharp under a 20x > magnification.... The image was shot with an LX (horizontal run shutter) > and was hand held....
Hi Rob, This sounds like some sort of shutter bounce, as I believe it's called. I recall reading in the 6x7 service manual about a mechanism to dampen shutter curtain bounce on the 6x7, but it never occurred to me that one might get bounce in a 35mm body. I suppose it's possible -- just don't know how likely. Also don't know if it's the leading curtain or the trailing curtain that's bouncing. Perhaps if you opened the back, set the aperture wide open and the shutter to perhaps a half-second or so, then fired the shutter while looking at the curtains, you might be able to determine if such a thing is taking place? I'd guess the double-exposure effect would be more apparent on a horizontally moving object than a still object, and might only be apparent for shutter speeds equal to or longer than the sync speed. Just my guess. Hope this helps. Bill Peifer Rochester, NY - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
