First off I am new to the forum so saying HELLO and I also have a question. I am starting up a photography website with my family and my brother and mum are taking the pictures and I then look at them and decide which ones will go on the site. My mum uses a digital camera and all the images come out crisp, my brother uses a professional flim camera and some of the images have blurry black/blue marks in the corners of each photograph. Does anyone know what I am talking about?? because I need to know if this problem is down to his equipment or his technique of taking photographs?