Does VR work as fast when using back focus on D800 compared to half pressing the shutter release?
We know that half pressing the shutter release button allows more time to allow the VR to become activated. However, I recently read somewhere that the back focus button now in the newer Nikon DSLR's work to stabilize VR. Does it work and does it work just as fast?
On the D800, VR is turned on by the AF-ON button as well as by the shutter button.
IF using AF-ON in AF-C mode and you hold it down while shooting, then the VR should already be active and stabilised by the time the shutter button is pressed. i.e. you should not need to wait for VR to stabilise by half-pressing, pausing and then taking the shot - if that is what you were asking.
I have this same question. I have read in a few places that the VR is only activated by half-depress of the shutter button and the AF-on will only keep the focus tracking on. This is stated as it will save some battery life by not continually engaging the VR system until you are ready to shoot.
Is this correct on all the bodies with a dedicated AF-On button, or is it different on some of the newer bodies (D800, D600, D4, etc)
Time was long ago and up to the new bodies that many of us liked using the AF-On button for several reasons, one of which was that it did not trigger VR. That was beneficial because (1) the image did not "jump" in the viewfinder, an issue with some original VR lenses, and (2) it saved battery life, somewhat of an issue way back when.
I still use AF-On — it's still a better way to go most or all of the time — and have gotten used to constant VR. Battery life is, for me, not an issue, as I get a full day out of a charge regardless of how much I shoot and chimp. And VR does not "bounce" the way it used to.
Jon Kandel A New York City Nikonian and Team Member Please visit my website and critique the images!