Hey guys, really enjoying my first DSLR (Sony a200) and I have taken some great pictures with it. However in order to improve my knowledge I'd like some clarification on several terms I have seen around the net and some personal questions. OK I had the Panasonic Lumix LX2 before I stepped up 2 months ago to an SLR. The LX2 when focusing would show what points have been focused on with a red light on the screen and would often show more than one section. On the a200 only 1 of the 9 points ever shows up as the autofocus point. Is this normal, is it a limitation of the camera (after all its entry level) or is it actually focusing on more but just showing the 'main' focus point? It never crossed my mind as I used my friends d40 that only has 3 focus points and only one would light up. It wasn't until I used my friends 450d last week where several points would actually light up (again I understand that the 450d is a more expensive model). Secondly, Prime lenses. I see a lot of talk about prime lenses. Do these offer higher image quality and a fixed focal length and aperture? Thirdly, I guess its 'framing'? Like a full frame camera view finder see's 100% of the image and has a 1.0 crop ratio so 18mm is effectively 18mm in the final image. Well mine is 95% finder which means i don't see 5% of the image that will actually turn out once I take it (so for example i could think I have missed out a certain obstacle but could still end up in the image?) and it also has a 1.5x crop factor. Does this mean it doesn't take everything the lens see's? so for example at 18mm x 1.5 = 27mm - Are my shots actually 27mm instead of 18mm? Ie the same lens on a full frame camera would result in an image more zoomed out at the same location (18mm)? Sorry I know its probably a confusing post but if anyone has the knowledge to help me out it is much appreciated.