QUOTE(aldosoesilo @ Mar 16 2011, 11:39 AM)
there was one time I did comparison with my friend who own 550D.
we did a bull shit talk regarding the best camera system. yeah we both agree Leica pawn both Nikon and Canon.
however we decide to do ISO comparison between 550D and D3100.
even though 550D having a capability to use ISO 6400 it's pretty unusable. where as D3100 having capability of ISO 3200 where it's pretty unusable on certain lighting situation. however in ISO 3200 I believe D3100 pawns 550D not for being subjective.
but I think Nikon will always 1 step ahead of Canon in term of ISO performance in their APS-C cropped camera because Nikon's ASP-C sensor is insignificantly larger than canon however those insignificant larger will make difference I believe.
anyway the test performed by me and my friend just a stupid test for curiosity fulfillment.
No thus scientific approach performed. (Didn't mount on Tripod, we just shoot it casually).
How did u test it? Don't tell me u use jpeg and view on camera screen to see the noise.. to me I always shoot with noise reduction turn OFF to get the maximum details..
1. Shoot raw, both exposure must be the same ( manual mode better )
2. turn off in camera NR.
3. crop 100% on lightroom and compare
To me that's the ideal way of testing noise performance