Hyperstar Helix with synthetic flat

[Rod771]

Two years ago (when I was a sky nomad shooting multiple targets in one night :screwy:) I imaged the Helix with the Hyperstar for 24 mins see here (http://www.iceinspace.com.au/forum/showthread.php?t=109507). Rick suggested next time I should do a few hours to see what I could reveal. Last year I tried it at F7 1960mm FL but really couldn't get anything decent above the noise. A tough task shooting through LP here in northwest Sydney.

This season I tried it again with the Hyperstar lens @F2. Shot 3 hours this year. The extra time definitely soomthed the background out and revealed the same faint detail without needing to stretch it until it broke! :)

I also used Ray's synthetic flat technique dicussed here (scroll down page 3 , start at post 53) (http://www.iceinspace.com.au/forum/showthread.php?t=122068&page=3) to calibrated the sub frames. In short you just use PI's DBE to extract the background model from a light sub and use it as a master flat. I also used a Superbias for the first time with this image.

Imaged with the C11 Edge HD with Hyperstar lens (560mm FL) F2.
Mount - CGEM DX
Canon 60Da @ ISO 800

Integration, 3 hours total. 180 x 60 sec subs.

Calibrated with darks, synthetic flat,and Superbias. Processed in Pixinsight.

Large click here (http://astrob.in/full/222654/0/?real=&mod=None)

Thanks for looking

Cheers

Rod

[Atmos]

That is looking quite nice rod, you're even starting to be able to see the fainter outer arm on the north west :-)

[batema]

Very nice.

[Camelopardalis]

That's a cracker Rod :thumbsup: so much contrast and texture in there.

[el_draco]

Great shot.

[RickS]

Some faint stuff starting to pop out, Rod. Very impressive for 3 hours RGB with a DSLR! Is it from a dark site or from home?

Cheers,
Rick.

[Rod771]

Thanks Colin, yes it's just popping out.



Cheers Mark!



Thanks Dunk! :thumbsup:



Cheers Rom!



Yeah thanks, Rick!

This one's from home through the muck. 3 hours from a dark site @F2, that would be interesting. I really threw everything at this background, dithering, bayer drizzle, Superbias , more darks than I usually take and Ray's cool DBE synthetic flat technique. I'm please with the result.

[RickS]

Especially impressive then, Rod!

[Shiraz]

Agree with Rick. That is an impressive image for a DSLR from suburban skies. :thumbsup:

[Rod771]

Thanks again, Rick! :)



Thanks Ray!

Pleasing results can be achieved when applying the great advice you and others offer here on IIS. Its appreciated to no end. :thumbsup:

[strongmanmike]

Not bad Rod, that scope would kick R's from a dark sky!

Hyperstar F2 from the Sydney burbs....Rod Connors, astroimager, scope lover and Thrill Seeker (https://vimeo.com/49784131):D (check out the guy at the 5min mark!!)

Mike

[Rod771]

Thanks Mike! It's had good results from Lostock but I've never got over 2 hours on one target up there with it.



:rofl: Yeah, like danger, I like to meet my astroimaging and "lick it" :lol: Although :question: I think my approach to AP is more Leo W@nker than Rod Connors. :lol: