I've just bought a 24-105L. I was terribly sad when I noticed that it was sharpless at any focal length. Shots taken with my old 17-85 IS and they were soooo sharp in comparaison. When displayed at 100%, all details are greatly visible.
Returning to my dealer, a test shot show me a very good sharpness of my lens done on a 40D exposed .
But I'm just thinking that I just switched to ON the ISO Noise Reduction function and allow my 40D to reach 3200 ISO.
Can this function affect low ISO too, making me loss sharpness of my images
It is the 1st time I'm hearing of this !
Do you use this function ?
I don't try with other lenses