I have a friend who wants to upgrade to either the Oly e620 or the Canon 500d from his Panasonic fz18.
He is very happy with the Olympus. He doesn't care about the video or the 3 extra megapixels. He loves the articulating screen and the extra reach of the Olympus due to the 2x field of view crop. However, there is only one problem. Noise. There are double comments on this one, he says. It is known that it is one of the noisier cameras. Given the smaller sensor, this is acceptable. But, reviews also state that it handles noise respectably well compared to APS-C sized rivals. Then, I saw Gordon's results page for high iso noise. I was shocked to see noise started to creep in right from iso200! Though very, very little, but it was present. Canon 500d gave very good results even at iso800, and though its sensor is little bigger, it does offer 3 extra megapixels.
But, that was the studio environment. Given that he is interested in shooting landscapes and wildlife, such as birds, what is the max iso that would give clean results?
For landscapes, he is happy to use iso200, even though it may be with a tripod. But, for birds and other wildlife, which he plans to shoot at the long end of the 70-300mm lens, giving a 600mm equivalent, high iso can be needed.
Is this camera up to the challenge there? One other reason why he is after the Oly is the 600mm reach, which will be cut short to 480mm on the Canon. In head to head comparison of both cameras, does Oly lose more than one stop of iso to give similar results in terms of noise? I have read that under-exposure leads to more noise in 4/3 system dslrs. Is that true? Also, some say that the E620 needs about +0.7ev compensation. Are noise levels more competitive with that?
Sorry for the very long post. Thanks in advance,