filmlover

Sorry for replying so late. I have been busy these days. After tape test I know that the leak is not from back mount . Then I went to the repair center to borrow another pair of body and back to test interchangeably. The result is that my body works fine with their back, but my back still has light leak with their body. So I know that the leak must be from the film magazine. I discussed this with the repair center, and they guessed the reason is that some part of the film magazine deteriorate through age or use. Actually one of the mechanics recalled that he saw a old leica m3 with similar leak. But they still fail to find the questionable part. In the end the repair center sold a little used film magazine to me at decent price. I hope that this reply can provide some thoughts to solve this unusual problem. And thanks to everyone again for enthusiastic replying.

Thanks for all the replies and help. The back is not attached to the body very tightly although I can not see direct light leak. Both body and back have some small spots of paint loss inside. So I use tapes to seal seams between body and back except the slide side, then close the viewfinder before press the shutter button every time to reduce light from outside. To my comfort , the light leak disappeared though I still don't know the exact cause of it.

Thanks for the reply. I just check it in the darkroom with a flashlight from different angles. I don't see the light from the auxiliary shutter. Also, the pre-lock of mirror will open the auxiliary shutter. However, if I set the flashlight above the body and remove the waist-level viewfinder, then push the shutter button, I can see light in the upper part of body while the auxiliary is opening and the mirror is not fully up. I discuss this with the repair center on the phone, but they think it's not the reason of the leak because the light is moving out of the body, besides, if the auxiliary shutter opens later, the expose of the film could be interfered. I can not tell the opinion of the repair center is right or wrong.

Hello, There is a strange light leak happening in my hasselblad 500cm recently. The leak is not from the edge of the film, but in the center of it. The leak emerges in similar position of the film, but not exactly the same. I sent it to the local repair center(I don't live in USA). They changed the light seal of the megazine and adjusted the rear curtain. However, the problem continues, and the repair center doesn't know what else could cause this. Does anyone know how to solve this problem or have any idea? The attached files are the pictures with the leak problem. Thanks for all you help.