Janne Kokkonen

Hi everyone, I purchased my first super8 camera via online, (also payed probably too much because I wanted it to be serviced and in fully working order) and looking through the lens there seems to be a red tape in the corner covering quite a big portion of the whole viewfinder. I have no idea wether this is something that is normal and fixable or if I should just return the camera. Camea model is Canon 310XL. Any help will be much appreciated. Thanks all J