@ Lostpatrol Ok It depends on which kind of lens. But if you take a 70-200 lens from canon for 1500 compare to an cheaper 500 zoom lens ther is a diffrenc but not big enough to pay 1000 more. This changes if you are using the 20D or even a better body. But with a 300D the diffrence doesn't matter. And the noise of the 20D is less cause of the new sensor and not only because of the 2 Mp more. I say this because I tested it. My friend has a 300D and we took some test shots with my lens and and his sigma lens for 550. Than I compared them at 100% and the diffrence is not so huch. I mean if you take a very cheap lens for 200 or so than you don't have to discuss it.