jeffreybehr
Member
Both shot handheld with the S1R, Sigma EF adapter, and Canon EF 100-400/L/II.. Kept the lens's IS turned off.. AF was slow but highly accurate.
As I wrote to my fotogbuddies tonite, "...the camera is physically VERY usable, the native 24-105/4 is excellent for walkabout, with adapters there are LOTS of excellent lenses available, resolution and other visual qualities are 5-star, three of my existing EF lenses--the two TS-Es and the 16-35/4/L/IS--are highly usable, and I've bought just one more, the EF 100-400 II.. And I can get ALL that stuff in my rolling case!!!
I love this S1R's qualities and set of compromises.