Sorry if this is in the wrong forum -- I couldn't find a beginner's forum on here.

I'm not sure if it's light leaks or something else, but I'm getting red bands in the center of my shots. Anyone know what's wrong?

Here's a particularly bad example: http://500px.com/photo/8493242

And here's one where it's less visible but still clearly there: http://500px.com/photo/7812231

I'm shooting on a Canon A1 with 35mm film.