"George Normandin" wrote in message
...
"Preston S Justis" wrote


......
That is one frame. The camera has a setting that is called 'long
exposure
noise reduction'.
Exposures of 8 seconds or longer can take advantage of this feature. I
don't
know if
it takes dark frames or not. The noise reduction routine does take
awhile
to
run after each exposure. If I remember correctly it took from 5-10
minutes.
You have to let it
finish before you can open the shutter again.........


There ya go! This Nikon DSLR has been written up in the photo rags for
having great noise reduction features and I bet that it kills off the hot
pixels. I'd still go with a series of shorter exposures just in case a
wind
gust or something comes out of the night to mess up the exposure. I wonder
if the camera will do it's 'noise reduction' on a saved file??

I don't know if it will. It runs right after you take the image. I was
shooting RAW+Hi res. jpeg.
I forgot to mention that I was shooting in color mode 1 which enhances the
reds in the image.

There are three modes with 2 being a nuetral (balanced) color and 3 being a
blue/green enhanced.

I bought this camera to do macro and telephoto photograhy of daylight
subjects and thought I'd try it out on some deep sky imaging. I'm very
pleased with what I'm seeing so far.

Scott


George N