|A Good Light Leak! - Tim Irving|
The cause of the problem is a Hasselblad film magazine. Hasselblad recommend that if you're shooting professionally, the light seal in the magazine, which is just a thin strips of foam and strip of rubber, should be changed at least once a year. I own three magazines and use my Hasselblad to shoot two or three rolls of film each week, which I consider light use, this is the first light seal to fail in nine years, I can't complain. I've ordered new seals for all three backs off Ebay. The Hasselblad should be up and running again in a few days.