[Xerte-dev] Re: Seeing Stars

[Ron Mitchell]

Nice pics and thanks for the tip about Deep Sky Stacker. No substitute for
being there at the time though eh! Dropbox is obviously quite good for
sharing pics e.g. a few of mine from Luosto earlier this year
https://www.dropbox.com/sh/miplecp5ksyuxpr/3Lx___8EQg what they don't show
is the dancing that happened at the time - people as well as the stars! ;-)

 

Ron

 

From: xerte-dev-bounces at lists.nottingham.ac.uk
[mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
Sent: 05 September 2013 12:18
To: For Xerte technical developers (xerte-dev at lists.nottingham.ac.uk)
Subject: [Xerte-dev] Seeing Stars

 

Hi,

 

I thought I'd share a couple of pictures I took of the stars whilst on
holiday. We were staying in the south of France, about 35km SW of
Carcassonne, and the sky was very dark at night in the second week after the
moon had disappeared from the night sky. The images were made by taking a
series of about 20 photographs (Nikon 7000D, 18mm lens, 20 seconds, F3.5,
ISO 6400) and then running the entire set through a  piece of software
called Deep Sky Stacker. What this does is uses the information in each
image to identify, and remove, the noise, resulting in a very clear image,
which it spits out as a 32bit TIF, about 250MB. Then a little Photoshop to
increase the contrast a little and stretch the histogram, and that's pretty
much it. If anyone is nifty with Photoshop and wants to have a crack at some
post-processing on the TIFs let me know and I'll put them somewhere you can
get them (I don't have them with me today), be interesting to see what
others can do with them! These are from the same TIFF, the top one has a bit
more Photoshop going on, I have another TIFF where the stars are sharper,
because a) I focused the camera properly (!) and b) I took more images, and
used dark frames as well as light frames in the stacker.

 

cid:part1.02090906.06020203 at tor.nl

 

cid:part2.04030404.02030400 at tor.nl

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