I'm a relatively new user of film, getting back into it after a few years. I've had the first B&W 35mm film developed and there are vertical stripes of light on lots of the photos - often in the middle but sometimes at the ends.
I'm not sure if this is user error from me, a film issue, or if there is a problem with the camera - a Canon AE1 that was given to me by my grandad. When I told him I was using his camera again he asked if I'd gotten it fixed - something I've not done as I hadn't realised there was a problem! Help gratefully received.