Hi i am new to this site and to photography using a DSLR so sorry for any silly questions. I have started a college photography course and was taking a few pics then loaded them into Lightroom but when i zoomed in on the pics i noticed there was odd coloured spots on the pic. After searching the internet came across a few topics on hot spots which is what they look like when comparing images on the web. So my question is since i have been using my colleges Nikon D40x is it likely to be more of a problem using a older camera like that than a much newer model or will it make no difference?. As i was thinking of also buying a second hand D40x as there cheap since i am just starting out.