*job nr* message after long exposure
I tried some long exposures for star tracks the other night and noticed that there seems to be a lag of the same duration as the exposure before the camera writes the data to the card. Specifically, after a 20-minute exposure it was another 20 minutes before the green light came on indicating that the data was finally being written to the card. In the top LCD display panel is the note *job nr* which I presume means job noise reduction? I had long exposure noise reduction on, but was not aware that this results in a doubling of the time before another image can be taken.
Is this normal for a D2x?
#1. "RE: *job nr* message after long exposure" | In response to Reply # 0bobj Charter MemberSun 02-Apr-06 03:43 AM
Yes, "job nr" means noise reduction. Yes, it is quite normal if you have the "Long Exp. NR" custom function enabled. The default is OFF, but you obviously have it turned on which is a good thing, really. The camera takes a second exposure of equal length to the first, but with the shutter closed. It then subtracts whatever records on it (which must be dark current noise) from the real exposure. While it will double the time for long exposures, it is well worth it if you check the results.