Interesting and rare comparison: Nikon D70 with Sigma APO 70-200 f 2.8 HSM against Canon EOS 300D with Canon EF 70-200 L USM. Both set at ISO 200, no sharpening, daylight WB, RAW. Opened in PS CS, resized to get same scale, EV correction to get same brightness (no contrast change), crop to 600x300 pixels. Image flattened and simple sharpening done. Shooting time difference 40 minutes.