Unless you need the f2.8 the f4 has less distortion and better performance pretty much across the focal range
Noticeably Rob....it's more than adequate right into the corners, something that the f/2.8 never really achieves.is the f4 sharper compared to the f2.8 stopped down to f4 ?
Rob.
Thanks for that info ,nice to know that.Noticeably Rob....it's more than adequate right into the corners, something that the f/2.8 never really achieves.
Bob
That was the reason for my acquisition, Richard. I have two IR converted 5D2's and need to focus using Liveview (often without a tripod). The IS makes Liveview at 10x quite usable for typical landscape composition. I've recently added the 24-70/4 IS for the same reason....sadly it's nowhere near the same quality (optically) as the 16-35/4 and also falls short of the 24-70/2.8 MkIIAnd the f/4 version has IS of course, taking hand-holding deep into normal tripod territory![]()