Regis wrote:
You will be happy with your Canon 300 2.8 II lens as I am with mine. According to DxO Mark, this lens is sharper than the 400 2.8 II, 500 f/4, 600 f/4, etc. According to my friends who have these other lenses, my photos are sharper. A recent Osprey photo, below, was taken with my Canon 5Dsr, Canon 300 2.8 II, Canon 2x III extender.