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  #21  
Old 16-09-2008, 05:30 PM
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Tamtarn
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Amazing image Greg, the vast amount of clear detail within this colour range is incredible.
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  #22  
Old 16-09-2008, 07:26 PM
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Quote:
Originally Posted by Tamtarn View Post
Amazing image Greg, the vast amount of clear detail within this colour range is incredible.

Yes I was surprised as it was taken from my backyard in Sydney and I live in Kellyville which is about 35kms NW of the city. Looking south I look through a lot of light pollution as that is Castle Hill, Parramatta, Liverpool and Campbelltown so a lot of suburbia and a bright sky glow.

So these 5nm filters are also very good (the O111 though seems to leak and Gradient Xterminator was needed to handle that - perhaps 1x1 will stop that problem).

I looked at changing from an RCOS to a few different scopes, an ASA was one choice and I nearly bought a 12 inch that had been "fixed up" but the seller suddenly dropped out when I quizzed him about some potential defects - buyer beware eh?

I have found F5 a good imaging speed with the FSQ - not so fast as to be super fussy and highly demanding yet very bright and detailed images with a reasonable imaging exposure time.

1268mm focal length is also a good focal length for many objects.

I have a smaller chipped FLI Microline 8300 on the way for galaxy imaging and close up views.

It should be a good setup and suits my specific requirements as I usually travel to my dark site and time is somewhat limited so a 15 hour megadata collection at F9 is out of the question usually. 3-6 hours at F5 will image just about anything.

I forget the ratios exactly but F5 is something like 5 times faster than F9, possibly more.

Greg.

Last edited by gregbradley; 16-09-2008 at 07:55 PM.
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  #23  
Old 17-09-2008, 07:10 PM
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Greg,

That is the best Tarantula image I've ever seen. Well done!
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  #24  
Old 17-09-2008, 08:20 PM
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Wow! Thank you Peter.

Greg.
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  #25  
Old 21-09-2008, 04:00 PM
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multiweb (Marc)
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Was just checking this picture again. Can't seem to get over it. It's a work of art mate. You're the van gogh of astro photography.
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  #26  
Old 21-09-2008, 04:14 PM
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Wow, thanks very much Marc!

Greg.
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