Gaat over t VR systeem op n AF-VR 80-400 mm f/4.5-5.6 ED Nikkor lens .
Please note I stressed "handhold" operation. Mounted on a tripod, however, VR operation is unreliable and in fact more than likely to kill sharpness in a number of situations. I have compared a fair number of test images taken with and without VR action, and in no case is sharpness better when VR is operating. To the contrary, image blurs are readily detectable at slow speeds with VR activated. This is valid for both types of VR settings. On continous VR, visibly blurred images result at 1/8 sec and slower when the lens is tripod mounted. The alternate VR setting holds up slightly better and many exposures around 1-2 secs were tack sharp. However, ever so often such images simply lost all sharpness due to motional blur. Test shots revealed that it was VR operation that caused the blur. Probably VR detected slight vibrations due to mirror bounce and tried to correct for this impulse impact, but overshooting its correction in the process. Whatever the underlying reasons, the conclusion is that VR must be turned off when the lens is tripod mounted. Sometimes VR works, sometimes it destroys all sharpness, so to be on the safe side, it should alway be switched off in these cases. Unless, of course, you are using an amateurish wobbling tripod in which case the VR system would find plenty of vibrations to lock onto. Seems people get nice results operating the 80-400 VR on a monopod too, probably for a similar reason.
gaat dit alleen op voor Nikon , of hebben de IS types van canon dit ook ???
Gr
Vooral dat vr uitzetten op n statief , moet je maar opkomen
Ik heb wel eens geschoten met de 100-400 van canon en je moet een behoorlijk vaste hand hebben wil je met dat ding zonder IS schieten. 
