Friends,

I use an Arca Swiss (B) 4X5 camera and I am getting light leaks on the negatives. recently I discovered that the bellows had holes (they are apparently original,) so necessary repairs were done and light tested) to be sealed, yet the light leak persisted. It is linear light streak occurring at the top of the entire negative (when looking at the camera from the ground glass end) in landscape mode and on the left vertical side in portrait mode. the points I used to narrow it down so far

1) it occurs across all film holders (Fidelity Elite, carefully carried and used) so should be a camera related phenomenon.

2) it shifts with rotation of the back - topside to left side hence not in the bellows or back frame.

3 I have checked the entire fitting, Film holder housing and back frame in a dark room with a strong light shining inside the bellows but could not discover the leak.

any thoughts grateful acknowledged

thanks

Ashish