NGC253 Close up

[Bassnut]

Hi Guys

Been a while since ive done a full frame LRGB (well, anything really), weather has been atrocious untill lately.

Usual trouble with big stars (NABG cam), and try as I may, I couldnt extract the streamers some have managed to revieal, heavy urban pollution may have been a factor :(.

Anyway, here (http://4256458530705943474-a-1802744773732722657-s-sites.googlegroups.com/site/fredsastro/home/NGC253%20LRGB%20final%20A.jpg?attac hauth=ANoY7cpN3L3ubtgFnDo6uJjNq4MD_ HzIp6MqUBWf0TQJu45Ok_vrecPnWzF7GBUs xxe0Oh7HYC4K27MSQgKLRyeXpGZhhWnvmlE eWN0QJu4QXCvhgmu5W2ti_TdSdLq9o_728Q tAYwxdLPEVxtEuEGWTt5XskKxtXc-TZ8dCElo-GRglskH9X6HqgwIxDGJEKVIRTlI3qJcH-AzvEzL_7BKWYzAdsjkb2A%3D%3D&attredirects=0) is the 2meg pic. And here (http://sites.google.com/site/fredsastro/) on my site front page.

Lum 7.3 hrs Bin1: RGB 2hrs each Bin2 all 10min subs

[kinetic]

Fred......gobsmacked!..

The version on your site that allows a slightly bigger zoom is just
wonderful.

Edit: my mistake Fred...same scale <facepalm>

Not enough superlatives!
Inspiring stuff.:thumbsup::eyepop:

Steve

[Octane]

Nup, don't like it. Too many stars. Looks like mushy golden pea soup.

Have you tried removing the stars to reveal the streamers? :P

Magnificent work, Fred. :prey2:

H

[Bassnut]

Well thanks Steve. The direct link should be the same on Explorer 8 when you click the + zoom, a puzzle :shrug:.

Thanks H, I must appologise for a substance induced inappropriate comment I might have made on a recent image of yours, that was of course excellent but may have been cobbled by posting res, and a deliberate wind up by a certain (previously) *fit* (strong :P) pest of these hallowed pages ;).

[multiweb]

Terrific shot Fred. Real vibrant colors. Love the saturation and details. Top stuff! :thumbsup:

[Bassnut]

Thanks Marc, glad you liked it.

[marc4darkskies]

Superb Fred!! :thumbsup::thumbsup:

Cheers, Marcus

[RobF]

Pah - I don't believe it - this must be some NASA simulation of resolutions the James Webb 'scope will be capable of surely. I'm heading off now to track down which site it came from ...... :P

Superlative Fred! Most amazing 253 pic I've seen. Kinda makes it a bit pointless for the rest of us trying to wring out the odd dust lane though. :(

[strongmanmike]

Yes, it is rather comical following your roller coaster comment moods Fred... :drink::drink: :screwy:....we love'em :rolleyes: keep'em up :lol: :thumbsup:

A strong bold image there for sure with some great detail.... a solid Vandernarrowfielden piece of work :P.

Mike

[DavidU]

Very very nice ! Oooohhh lovely.
Is there a few hot pixels?

[Jen]

:eyepop::eyepop: woah nice piece of work there Fred :thumbsup::thumbsup: very nice :)

[Bassnut]

Ill only bother responding to a hot astro chick on this occassion, Im pissed, thanks Jen :D.

[Jen]

:lol::lol:
:drink::drink:

[gregbradley]

Very striking image Fred. I see the streamers. A lot of rich colour and a high impact image.

Greg.

[Bassnut]

Thanks Marcus.

Hehe, cheers Rob, high praise ;), its always worth wringing out the last anything :thumbsup:.

Taa Mike, bold?, mmm seems the same sort of levels etc as the usual reference pics :).

Thanks David, yes there are a few left damb it, ill fix that.

[AlexN]

Fred - Your image oozes awesomeness.... I see the streamers in there.. In any case You should be super happy with that shot mate, its a killer....

I reckon if you rotated the camera by about 30° you could probably have gone for a SLIIIGHTLY longer focal length.. :D haha

[vindictive666]

all i get is a google download attachment page
your site link works though

regards john

[Bassnut]

I know, its a pain.You then click "here" (on that page) to download the pic.

[Phil Hart]

well that sure is some serious narrowfield imaging there Fred. respect!

[jjjnettie]

Superb image. Glorious detail.!!!

[Martin Pugh]

Great detail in that image Fred - you could of course help alleviate those big star problems by shooting your colour unbinned also.

That ST10XME you bought from me is a sensitive guy.

cheers
Martin

[marco]

Very nice details and tak sharp Bassnut, well done indeed!

Clear Skies

Marco

[irwjager]

Just beautiful! Lots & lots of detail - the processing is spot on and exactly to my taste (except, if I'm nitpicking, a faint blue gradient/block/artifact in the bottom half and the odd hot pixel).

Awesome stuff! :thumbsup:

[Peter Ward]

Narrow field rules.:thumbsup: Good to see you keeping the faith :)

[renormalised]

One of the best shots of 253 I've seen....fantastic work, Fred:):):)

[gregbradley]

I agree, I am a big fan of colour shot in 1x1 and have made the switch. I get way better resolution plus you can desaturate your RGB and use it as additional luminance (not sure it makes much difference if any though).

With my refractor there is quite a big difference in resolution that is noticeable in images between 2x2 and 1x1 in RGB. It is more apparent with shorter focal lengths - something you won't have to worry about!

Greg.

[Bassnut]

Oozing......... I like it :P. that would be a "refractor"... killer ? :lol:, but no, im happy with it. I was stuck with that composition due to only one suitable guide star.



Should be for the money spent :P ;), thanks Phil.



hehe, thanks JJJ



Thanks Martin. The lum blooms heavily even bin 1 . Bin1 colour means double the exposure time for a given S/N ratio unforch, I just need to get better at processing bloomy stars.

Yes, yr ex ST10 sure is sensitive, Ive still got it cause I cant find a better one (QE, AO etc), looking forward to an STX 6303 in the future maybe. The 3nm Ha you also supplied me is my secret weapon, best filter I have, its awesome, but requires hi QE and megadata to fly, hence me sticking to NABG.



Thanks Marco, dunno about TAK sharp ;), but not bad for the FL.



Thanks Ivo, I must fix that, damb it, so stupid to miss :P



Of course, is there any other ? :shrug: :lol: :thumbsup:



Thanks Carl, but oh for dark, stable skies :P



At my FL, bin1 is 0.62 arc/secs and bin2 is 1.25 arc/secs, so ive even considered binning 2 on Lum on dim stuff, given seeing is rarely better than 4 arc/secs, im hard pressed to tell the diff usually. It would make a big diff with short FLs I guess.

Someone recently mentioned not using lum at all and taking just RGB at bin one and lots of data for all filters. Thats an interesting idea, must try that with a bright object, the quality diff might be worth it.

[renormalised]

Might have to emigrate to Chile!!!!:):P

Or Hawaii:)

[seeker372011]

took about 7 minutes to download (on my phone)

Worth the wait
Narayan

[gregbradley]

At my FL, bin1 is 0.62 arc/secs and bin2 is 1.25 arc/secs, so ive even considered binning 2 on Lum on dim stuff, given seeing is rarely better than 4 arc/secs, im hard pressed to tell the diff usually. It would make a big diff with short FLs I guess.

Someone recently mentioned not using lum at all and taking just RGB at bin one and lots of data for all filters. Thats an interesting idea, must try that with a bright object, the quality diff might be worth it.[/QUOTE]


That is an interesting idea. I remember a posting by I think it was Roland Christen of AP saying the same thing about getting maximum resolution.

Daniel Verschatse has some nice high quality RGB shots on his site. He obviously experimented with that as well.

I'd be curious to see the results of that idea.

The 2x2 binning on colour I noticed on my FSQ with reducer at F3.64 and it was a major difference. I guess that is the number of arc seconds/pixel thing being so poor at F3.64 with small aperture.

Greg.

[Octane]

Fred,

:lol:

Mate, nothing to apologise for, I know you're just a cheeky bugger with a penchant for narrowfield! If I had the funds, I'd join the party as that is also where my joy lies. : )

H

[strongmanmike]

OI! don't blame me for your substance abuse :mad2:

:rofl:

And..I still have big stomach bones :P

[Bassnut]

Sigh, no, its not substance abuse, its substance guided/boosted (mostly) Sid abuse, someone has to do it, its a community service :).

[AlexN]

L o l

[Paul Haese]

Nice work Fred. I can see the streamers on my screen and the saturation looks pretty good. I don't mind the star size either. Certainly up to your usual standard. Well done.