I've been taking majority of my pictures indoor/home (moderate lighting) and find my XTI mated with my 24-70L to be excellent/tack sharp at f/5.6 to 6.3 with my 580EXII. I just find at f4 the images to be good but not tack sharp. No doubt all the pictures would be phenominal with a 5x7 print. The price of this glass makes me so concerned. I still have plenty of time to send it back to canon if this is an issue. My camera has been back to Canon already and has been calibrated so the camera is probably not a variable "if this is a focussing issue." or is this simply a sweet spot issue of my particular lens?
Is this due to my pixel peeping behaviour or am I just being unrealistic. My 70-200L truly appears to be tack sharp even at f/2.8 to 3.2 indoors with the same lighting. I'm just wondering if the small sensor in my XTI just cannot take advantage of the 24-70L.
The 24-70L has never disappointed me when outdoors. Perhaps this is just the fact that the quality of light is my issue for indoors.
TIA I appreciate any input.