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Old 07-02-2011, 11:30 AM
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h0ughy (David)
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Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
Posts: 33,428
Quote:
Originally Posted by multiweb View Post
Great shot. The region around the keyhole is very well defined. Nice one.
Thanks Marc – it surprised me as the guiding was all over the shop with scintillating stars.

Quote:
Originally Posted by jjjnettie View Post
good on you for getting out there Dave.
Lovely work.
Thanks JJJ – you know how nuts I really must be LOL

Quote:
Originally Posted by danielsun View Post
Nice one Houghy. Other than the colour, that is still very nice with huge detail!
Just wondering, with being a cooled camera and such a hot night, what were your exposure lengths and how many?

Cheers Daniel.
The image is made up of 20 x 30 sec, 20 x 60seconds, 1 x 300sec, 6 x 605sec – would have been a lot longer but for the cloud that drifted over (very quickly), ISO 800

Quote:
Originally Posted by DavidTrap View Post
From memory, the original article from Covington was regarding a UNmodded DSLR. It suggested colour conversion with Red ~150% to compensate for lack of red response of the UnModdded sensor.

I think the ratios I have used were based on what gave me a reasonable colour, compared to other imagers results. You could do some experimenting and achieve a more scientific result.

Maxim saves the image as an unconverted FITS file. Flats & Darks are applied before colour conversion. Not sure how PixInsight works.

DT
I might have to do a lot of experimenting David – I am far from happy and I have no star colours – that may be due to the stars being overexposed to get the nebulosity? But I did think the shorter shots may help put that back into the image?
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