Photos ruined by red tint: who / what is at fault?

When a film is exposed to light before insertion into the camera, during insertion of afterwards or on the way to processing it looks this way. Because the film is rolled not all parts are exposed and some still can be developed. The AE1 can either be used with two film cartridges (the exposed film is rolled into an empty cartridge on the right replacing the "spindle", called "Rapid Film") or rolled on a spindle and has to be rewound after complete exposure. It must be rewound with a handle. It happens very often that the image counter being driven directly by the handle goes back to zero and the film which had slipped out of the roll on the left or was not rolled tighly on the right side yet is only 50% in the cartridge. When the camera is opened then the half of the film which is outside is gone. Opening the camera when the counter is at "zero" is recommended in the manual. The only reason is because it avoids that the first tiny part of film disappears completely in the cartridge which then has to be opened manually in the lab. After having destroyed many non replacable and non repeatable holiday memories with consecutive crisis in relationship and "near divorces" like myself many people rewind until the handle turns much easier. Who cares about the lab, This way thousands of marriages and one workplace is saved. Those films cannot be proccessed full automatically by a lab computer. The lab assistant must open the can first.

However: First it must be checked if the red spots have corresponding green spots on the negative film. If not it was a faulty processing of the positive images which is a lab failure and has to be compensated. Repeating processing then saves all. If yes; meaning the NEGATIVE was unintentionally exposed, I would buy the cheapest film and shoot 10 pictures of anything giving it to another lab, mounting and unmounting the film myself in a darkened room and immediately letting it disappear in the black box which I would close and secure with some tape if necessary to send the film by mail. Alternative: same procedure using a color slide film where all processing is included in the price and carried out in the lab of the film company itself, which always are the best ones. If the problem persists, buy a DigiCam or a used Canon "analog" camera. Recently I saw an A 1 for US $ 25.- including a TAMRON 70-400 Zoom. For gods sake don't let the AE 1 repair unless you are responsible for a camera collection of the local technique museum.

(I had and still have an A1, AE1, T70, EOS 10 D and EOS 1D).

PS: rereading your text I might have overlooked that the spots are exactly on the samel places on every single image, not one half of the film is overexposed. Then its the shutter: forget it. Give it to your little brother together with a screwdriver to look whats inside.

Sounds like a shutter problem. Light is leaking into the frame between shots. You can take it to a repair shop, but it may be cost prohibitive to repair. Let them see the film/negatives or prints.

Please provide the photos. This could be a lot of different things.