
Originally Posted by
arash_hazeghi
Carl,
At this point it is better to wait for 7D due to its supposedly superior AF, faster frame rate and all other new features if you can afford it. 50D is noisier than 400D and 40D (IMO), but the amount of noise you will end with in the final image, well depends on your work flow and how you process the CR2 files, and at the end of the day it is a subjective matter. Some people have found noise performance of 50D to be fantastic and some people have found it completely unacceptable, they are all accomplished photographers so the division in opinion is a result of different tolerances people have for noise and different work flows.
Nevertheless 50D is an upgrade to 400D due to its AF 6fps burst, large buffer and better finder. So it is a better overall choice for birding, despite its noisier sensor.
You will hear many divergent opinions here, my recommendation to you is to rent the camera for a few days, take some photos and then process the RAW files based on your work flow and then decide if it is good enough for you or not.