Long exposure NR actually takes a blank exposure just as long as the original (with the lens cap on IIRC) and reads the "noise" from the sensor and removes it from the original photo. A long exposure is several seconds or more. Exif is reporting no blank photo was taken.
"Beauty is in the eye of the beholder and it may be necessary from time to time to give a stupid or misinformed beholder a black eye." Miss Piggy
So, if I want to use long exposure NR, and my speed is faster than 1 sec, and if I leave the camera turned on, wuold takihg the first shot with the lens cap on maintain the long exposure noise reduction for all shots, or not?
BTW, this is with the lastest D700 firmware, as well as the latest ViewNX2. Apparently, ViewNX2 is irrelevant to this issue (except for reading the EXIF.
LENR is done on a frame by frame case basis. The usage will not carry from one frame to the next. If your shutter speed is faster than 1 second, you should not be having the issues that LENR handles. LENR is not the same thing as "grainy" noise reduction.
---------+---------+---------+---------+---------+ Joseph K Seattle, WA, USA
Pg 277 of the manual Frames taken at a slower speed than one second ..
Lens cap does not need to on from what I know. You should have the viewfinder curtain shut though when doing long exposures.( 700 has that built in. Some other cameras, like my 300s, have a little piece of plastic that you have to slide in manually).