you can put the light into the lens board hole. in a darkened room, inspect the entire camera with the bellows extended to check everything for the slightest leaks. be sure to put a film holder in with the dark slide removed as well.

this is the best way to find light leaks.


Quote Originally Posted by Louis Pacilla View Post
I would take your camera with a holder inserted in the spring back in a dark room put a bright flashlight inside the bellows and sit for 5-10 min until your eyes adjust & see if you get a hint of light making it's way out anywhere camera bellows,spring back.
You will also want to make sure you have no leaks in the holder/holders so do a paper test in your holders by putting a piece of RC paper in each side of the holder put them in strong light for a few hours then develop in Dektol or like paper developer and see if your troubles there. I doubt this but worth checking.