Photo Pete
Veteran Member
I suspect the subject and camera settings could be the problem.
AFC 9 point will more often than not mean the camera is focusing somewhere other than you think. Try afc single point..
The pigeons are small in the frame and I doubt the af system could distinguish between the back pigeon and the front of the chimney. The extra 100mm reach of the sigma could reduce this issue as the subject would be larger in the frame.
The lens has not been AF fine tuned. My 80-400 needs around +10 at 400mm over long distance.
VR can also produce odd results at high shutter speeds
In any event, these results are much poorer than with my copy on a D800, so something is wrong. Either AF fine tune, poor test target, poor choice of AF settings, inappropriate use of VR at high shutter speeds or (hopefully this isn't the case) sample variation and poor QC by Nikon.
I'll try to post some crops at similar range, but it won't be for a few days due to work pressure.
--
Have Fun
Photo Pete
AFC 9 point will more often than not mean the camera is focusing somewhere other than you think. Try afc single point..
The pigeons are small in the frame and I doubt the af system could distinguish between the back pigeon and the front of the chimney. The extra 100mm reach of the sigma could reduce this issue as the subject would be larger in the frame.
The lens has not been AF fine tuned. My 80-400 needs around +10 at 400mm over long distance.
VR can also produce odd results at high shutter speeds
In any event, these results are much poorer than with my copy on a D800, so something is wrong. Either AF fine tune, poor test target, poor choice of AF settings, inappropriate use of VR at high shutter speeds or (hopefully this isn't the case) sample variation and poor QC by Nikon.
I'll try to post some crops at similar range, but it won't be for a few days due to work pressure.
--
Have Fun
Photo Pete
