Ngc2997

[gregbradley]

This is one of the first galaxy images I have taken with the Tak BRC 250 and FLI Microline 8300.

The F5 of the BRC shows it strength by showing the faint outer spirals of this beautiful spiral galaxy that are not normally shown.

LRGB 90 30 30 30 all colour 2x2 binning and 1x1 for the luminance.

http://upload.pbase.com/image/108016422

Greg.

[peter_4059]

Lovely shot Greg - great colours. Looks like you also picked up a satelite there.

Peter

[Peter Ward]

Greg not bad, but....sorry the data lacks fine detail and structure.

As to the reasons...perhaps not enough FL or seeing not great on the night?

The stars look a little bloated to me. More the pity as the S/N looks to be excellent.

[gregbradley]

Hi Peter,

Yes its never going to be a 14.5 inch type resolution but I am happy for now with this approach given my situation of driving 3.5 hours when I can get away to uncertain weather this last year. Also with longer exposure times the detail also goes up.

The stars I ended up using a bit of Gaussian blur as I have started using deconvolution on all the subs and they seemed a bit harsh in the end so I softened them a tad. Also this camera will oversaturate on brighter stars more quickly than other cameras due to its small well capacity. I guess all CCDs have their compromise and that is this ones. Overall an excellent CCD with its strengths in its sensitivity, relatively high QE at 60% and extremely clean and defect free.

A 17 inch Planewave CDK would be hot but a remote internet controlled site really requries permanent power and someone on site in case something doesn't work as planned so that is not really practical.

Seeing was excellent which it often is there as we had a high around the area.

I am thinking of another angle to extract more out of the BRC. Yet to be determined.

The TEC180 I think will give higher resolution although longer exposure times.

Greg.

[multiweb]

Great colors. I like it a lot.

[gregbradley]

Thanks Marc, you're on the Christmas list!

Greg.

[strongmanmike]

AH HA! knew it... I just knew it!



I think something has gone amiss here, I agree with Peter the detail I would have expected just isn't there :shrug:. Excellent reveal of the faint outer arms though :thumbsup:.



Yep, I recon you might be right re the resolution, I bet you are chomping at the bit to get down and use it proper :thumbsup:

[gregbradley]

I have some other galaxy images that came out better. The other one is nearly 7 hours and got better detail so this one is a bit short in exposure.

I still like it as it is bright even if it doesn't have that large aperture RCOS detail.

I am looking forward to seeing what the TEC will do.

Greg.

[renormalised]

Nice shot, Greg:D