Looking for help! Mamiya 645 blue stripe

[acharlie]

Hi, looking for some advice, I bought a Mamiya 645 in mint condition recently, first roll back and the pictures are hit and miss, some have a blue stripe / fog across them. Does anyone know what I might be doing wrong?

Sample pics attached

thanks!
A

 

[acharlie]

 

[acharlie]

 

[480sparky]

Light leaking in from the viewfinder. When your eye isn't there, cover it up.

 

[acharlie]

Light leaking in from the viewfinder. When your eye isn't there, cover it up.

Ah great to know, thanks for your advice!