I finally tried a few 10 through 30 second exposures with a D800 and was surprised to find that with Long Exposure Noise reduction set to "on", the camera takes a dark Frame as expected but you
are locked out from any further shooting until it finishes the dark frame. This is very unlike Canon with which I admit I have more experience with. When you turn on Long Noise reduction on Canon,
5d MKII, 1D MKiv, 1ds MKIII 1ds MKII, you can still shoot again while the camera writes the dark frame in the back ground. If you shoot a bunch of long exposures say, 30 minutes each, eventually
even the Canon Buffer fills up and you are locked out for a while, however in shooting thousands of 5" to 20" shots, I have never hit the buffer. With Nikon you hit it at shot number 1.
This surprised me as this is just as Phase One handles a dark frame. Nikon starts it at exposures of 1" or longer.
Has anyone found a setting that allows the D800 to continue to shoot while it's writing the dark frame from the previous exposure? BTW, from what I can tell, Nikon's method is exactly like Phase one in
that you are kept out of shooting as long as the previous frame was, i.e. shoot 20" then wait 20" etc.
Again I was pretty surprised to find this hope someone has found a way around it besides turning off Long Exposure noise reduction.