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Author Message   Hanskerensky Tinkerer Username: Hanskerensky Post Number: 114 Registered: 05-2009 Rating: N/A Votes: 0 Posted on Saturday, October 15, 2011 - 12:49 pm:    So when these marks are only visible on the 6x6 image frames and not on the edges of the space between 2 image frames then it looks to be some kind of reflection from the internal sides of the filmchamber (or lens tubus ?). These sides should be black and have a matt finish. When they are glossy (oil ?) you could get something like in your photo. Another cullprit could be that the lightshielding brush around the tubus of the taking lens is not good any more but that normally gives more circular lightleak patterns.