kevin_hundsnurscher Posted May 18, 2006 Share Posted May 18, 2006 I had two rolls of film come back from the lab looking like this. The white spots shown below appear on all of the frames on the film at the same position. The equipment was a Mamiya RZ67 with a 65mm lens, 220 back and a strobe. The strobe was triggered from the lens.<br>Could it have possibly been the lab?<br><br><img src="http://elaisted.com/ljprev/beach-damaged-frame-2.jpg"> Link to comment Share on other sites More sharing options...
winfried_buechsenschuetz1 Posted May 18, 2006 Share Posted May 18, 2006 I don't think it was a lab problem. If light streaks or bands are caused by processing they would reach across the spaces between frames. The lower light streak reaches to the edge of the frame but is not visible on the space (left). Reddish spots in most cases are caused by light leaks behind the film. Slide film (I think you used this) has an orange filter layer which is washed out during processing. Any light coming from the back of the film will cause orange/red spots. The lower light streak might be caused by "banding" (improper movement) of the shutter curtains (check the direction of the shutter curtains), or reflections inside the camera body. Link to comment Share on other sites More sharing options...
ivan_dzo Posted May 18, 2006 Share Posted May 18, 2006 Can't be the lab because the edges are evenly developed. Looks like a shutter/flash sync problem to me. Link to comment Share on other sites More sharing options...
edward_karaa1 Posted May 18, 2006 Share Posted May 18, 2006 Couldn't be a flash synchronization either, this would usually cause dark unexposed areas not white. Most probably the lens shutter blades as suggested above. Link to comment Share on other sites More sharing options...
bueh Posted May 18, 2006 Share Posted May 18, 2006 This is easy. Had the same problem (though more severe) with one of my backs. See how the lighter area extends onto the edge of the film? This means it's a light leak that was caused by light entering the back from the side or above while the film was not moving (so it comes out pretty sharp and defined). See <b><a href="http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00EXWD">this thread</a></b> for more info and an easy solution. Or use duct tape. Link to comment Share on other sites More sharing options...
gary_watson Posted May 18, 2006 Share Posted May 18, 2006 I'm guessing it's a leaky back given the uniform position. Link to comment Share on other sites More sharing options...
kevin_hundsnurscher Posted May 18, 2006 Author Share Posted May 18, 2006 Thank you everyone so far who has given me some input on this. For those of you that mentioned the problem being a possible shutter curtain problem; the Mamiya RZ 67 doesn't have a shutter curtain. I have one of those light seal replacement kits so I'm considering replacing the seals in the back and testing it out when I have some time. Link to comment Share on other sites More sharing options...
bueh Posted May 18, 2006 Share Posted May 18, 2006 Kevin, a quick and dirty fix is to simply put a strip of duct take on the side with hinge of the back. This is usually where the light seals are weakest and break down first. At least this was the case with my back and the duct tape worked fine. Link to comment Share on other sites More sharing options...
kevin_hundsnurscher Posted May 18, 2006 Author Share Posted May 18, 2006 Thanks Bueh, The camera is on loan to me so I need to be able to return it in the condition it was given to me in. Link to comment Share on other sites More sharing options...
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