Steve Perry wrote:
I may be misunderstanding - in the old system, it would definitely stay with the initial subject - if you look at the first post in this thread, I have a test there. When I do this with my D810 or D7200, I can focus on the primary target, move off, and then keep the primary AF point off the target for as long as I like and it will stay on the box, never tempted by what's under the main point. Even with the delay turned completely off.
Try this w/ your D810. Turn the delay off and place the selected/center focus point on something easily focused. If AF is held active, w/in about 3-5 seconds the AF will "jitter" and refocus. It will do this even if a tripod and remote are used.
It will also do this at longer delay settings, it just takes a lot longer. Since the focus hasn't been lost it must be the delay time running out.
Obviously, there aren't many times where one would choose dynamic AF with a stationary subject. I only noticed it when waiting for a perched owl to take off and staring through the viewfinder forever.
And with delay set to off it will refocus immediately as soon as there is something suitable under the selected AF point. Longer delay settings just take longer.
Mar 15, 2017 at 04:39 PM
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