good morning everyone, I am hoping to get someone's opinion here, I am in process of buying a D2X this weekend, and was considering accompanying it with an older 300 f/2.8 manual focus lens, (it's probably from the mid 80's) - now other than the obvious lack of ability to use aperture priority, etc... and the manual focus, would there be a downside to this???? - I guess the biggest question is... could it deliver sharp images and nice color even though it's that old? - or would I be best to just stay away. (it's got a very attractive price, thats why I am even entertaining the idea!) thanks in advance for any help!