FreeLists / az-observing / [AZ-Observing] Re: Leonids at Vekol

[Andrew Cooper <acooper@xxxxxxxxx>]

Pual,

My Nikon 995 has a mode called noise reduction (NR in the display), what
this really is is a dark frame subtract.  You can see this as the first
image appears on the display after your exposure length, then the camera
takes an equally long time doing 'something' before it is ready for the
next exposure.  What it is doing is really a dark frame.

Check, your 990 should have the same feature.

Andrew


Paul Dickson wrote:
> 
> On Mon, 18 Nov 2002 13:39:26 -0700, Paul Dickson wrote:
> 
> > Does anyone going to Vekol have a camera tripod they won't need tonight?
> > I'm bringing two cameras (film and digital) and I only have one tripod.
> 
> I would like to thank Joe Goss for letting me use his tripod, as well as
> all the rest of you who brought tripods.
> 
> I was able to take images with my Nikon Coolpix 990 digital camera until
> about 2 AM.  Then the camera would only 1/1000 of a second exposures at
> f/8.  Prior to that, I could take one minute exposures at f/2.5.  The
> first exposure of a powered sequence was the cleanest, with each
> subsequent image containing more noise.
> 
> I took some dark images with the camera (some deliberate, some not :-).  I
> don't know how useful they would be considered that the resulting image is
> a JPEG compressed file.
> 
> Thanks again everyone.
> 
>         -Paul
> 
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-- 

Andrew Cooper
Tucson, AZ
mailto:acooper@xxxxxxxxx
http://whitethorn.house.home.att.net
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See message header for info on list archives or unsubscribing, and please 
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