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Old January 3rd 08, 02:51 AM posted to alt.binaries.pictures.astro
Richard Crisp[_1_]
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Default ASTRO: M1 binned 2x2 in Halpha

Last night was clear but the seeing wasn't very good.

Still I liked the idea of shooting images and all I had to use easily was
the 18" which is set up 24/7 in the backyard.

So I decided to shoot the Crab in Halpha using 2x2 binning at 0.84
arc-sec/pixel (cm10 @ 3366mm binned 2x2)

Here is what I got: 19 x 10 minutes of Halpha binned 2x2

if I did the math right from a signal to noise perspective this is like
720minutes binned 1x1 (190 x 4) or 12 hours

I haven't shot flats yet and used one from early september. Don't look too
closely or you will see why I say I need new flats :-)





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