So my parents have an old film rebel (Rebel 2000 EOS) and a couple lenses with it. I JUST got a Canon 20D and have the Canon 50mm f/1.8 II lens. I was wondering if I could use the lenses on the Rebel on my 20D? Sorry if this is a ridiculous question... I came home for the weekend WITHOUT my camera and considered taking the lenses since they aren't used much anymore I didn't want to attempt to put them on if they didn't fit and mess anything up with my 20D. The two lenses are.... a Canon 20-80mm 1:3.5-5.6 II and a Canon 75-300mm 1:4-5.6 III Also, I'm very new to photography and was wondering what these two lenses are best for as far as lighting and type of action being photographed and the quality of the image they produce... Thanks!