My kit consists of a 55-200mm(4.5/5.6 II) usm lens, the standard kit lense and my 50mm 1.8.
The other day a friend of mine who is in the progress of switching over to a nikon setup offered me his 70-300mm USM IS lense. I've seen the lense and it is in perfect condition.
He needs his money soon, so he said he'd sell it to me for $150 canadian. I've used it for him on a few occasions (he needed help).
Do you think I should buy this lens and sell my 55-200mm?
Will there be an increase or decrease in quality?
I'm not professional or anything, i just don't want to buy anything thats inferior to my current setup.
----Brad---- 



