I recently ditched my 30D for the 50D. Among the principal reasons I decided to get the 50D instead of waiting for the 5D MkII model to come out was that I was able to utilize everything I already had for my 30D since they are compatible. This is a great feature because I can continue to use my batteries, grip and remote without a problem. What caught my attetion is the new screen, it is perhaps the most perceptible upgrade to anyone who has used a 30 or 20D, the screen is really clear and the better resolution is visible from the instant you turn it on. The Digic 4 system is a far easier More >