Ngc253

Peter Ward · #1 26-02-2008, 09:06 PM

Also found this one rattling around the bottom of the hard drive...

http://www.atscope.com.au/BRO/images/ngc253psd.jpg

Peter

coldspace · #2 26-02-2008, 09:23 PM

Very nice, looks like something I could eat

.

Matt

skwinty (Steve) · #3 26-02-2008, 09:30 PM

Hello Peter
Great images.
I suppose one's critique of ones own work is directly proportional to the
capabilities of the utilised technology.
If any of your pictures were mine I would be ecstatic.
I only have a 12" gso newt, eq6 pro and a canon 40dh so I doubt if i would be at all critical (IF they were my images).
Keep them coming.
Regards
Steve

Rodstar (Rod) · #4 26-02-2008, 09:35 PM

I particularly like the outer halo that is apparent beyond the shape one usually sees with this object. Your image brings out the extent of stars and dust in the outer-lying regions.

Thanks for sharing yet another awe-inspiring image, Peter.

spearo (Frank) · #5 26-02-2008, 09:56 PM

Beautiful
The thickness and colors just stand right out
lovely stars too!
frank

Peter Ward · #6 26-02-2008, 10:15 PM

Thank you gentlemen!

Admittedly, the image was very much a heavy artillery effort....which would have been so much easier if my backyard observatory was somewhere west of the Blue Mountains! .....but also testimony to the fact that CCD's can be used in very bright skies, yet still deliver tidy results....it's just a matter of exposure time...(no sales pitch here...just physics

).

Now.....if these Sydney thunderstorms would just move on......Orion has just about set for another year!

Hagar (Doug) · #7 26-02-2008, 11:31 PM

Great image Peter heavy artllery or not. A few years back NASSA would have had you on the payroll with images like this. It really sets the standards high for the rest of us mere mortals.

Great image

Ric · #8 26-02-2008, 11:50 PM

A fantastic image Peter, a very spectacular and well defined image of one of my favourite galaxies.

Thanks for sharing that one with us, it is very enjoyable to view.

Alchemy (Clive) · #9 27-02-2008, 05:45 AM

youll have to have a hunt around the drive for some more... and once those storms clear get into imaging mode.

marc4darkskies (Marcus) · #10 27-02-2008, 07:49 AM

Very nice image Peter - nice depth and detail

. Definitely on my hit list!

Can't help feeling it looks a little too purple though (?)

Cheers, Marcus

Geoff45 (Geoff) · #11 27-02-2008, 09:38 AM

Echoing Steve I'd have to say that I'd be ecstatic about taking a pic like this. However, I was wondering about the blue halos around the bright stars. Are these due to internal reflections in the camera? A bit of Photoshop work probably could get rid of them.
Geoff

Peter Ward · #12 27-02-2008, 09:47 AM

Quote:

Originally Posted by marc4darkskies

Very nice image Peter - nice depth and detail

. Definitely on my hit list!

Can't help feeling it looks a little too purple though (?)

Cheers, Marcus

Probably a case of screen calibration....in any event I've tweaked it up a tad just for you Marcus

leon · #13 27-02-2008, 07:35 PM

Hi Peter, now that is certainly a brilliant image, however can I suggest that i find it a bit noisy, yea i know I'm sticking my neck out here,

but I'm sure you would prefer that rather than just saying it is nice, and think other wise, as you know I'm still learning, but need to be objective.

Maybe it is my monitor.

Leon

Peter Ward · #14 27-02-2008, 07:44 PM

It's O.K. Leon....there is some background stuff happening there, but not knowing what resolution/gamma levels people are running their monitors on I can only go with the screen in front of me....which tells me I mentioned the war, but may have got away with it!

Quote:

Originally Posted by leon

Hi Peter, now that is certainly a brilliant image, however can I suggest that i find it a bit noisy,...

Leon

iceman (Mike) · #15 27-02-2008, 07:50 PM

Incredible resolution! Heaps of contrast in the outside dust lanes.. Beautiful image, Peter.

robin · #16 27-02-2008, 09:39 PM

Ah c'mon, its a hubble pic! (Seriously awesome shot Peter, well done)

Bassnut (Fred) · #17 27-02-2008, 09:50 PM

OK, pretty cool, unusually flourescent, but given the gear, I some times see tiny vertical plumes on the dust lanes on other pics missing here?

rat156 · #18 27-02-2008, 11:48 PM

Hi Peter,

I have a calibrated monitor and it's purple, definitely. Actually a bit fluorescent. Other than that, absolutely awesome.

Cheers
Stuart

Alchemy (Clive) · #19 28-02-2008, 06:03 AM

just popped back for a couple of processing questions hoping you could share with us ( theres not enough discussion about this on IIS IMHO), being as it is definitely sharp but has a different look to it

during the processing did you use a high pass sharpening filter, not the variety in photoshop but one that sharpens just the high values, i think this is what makes it look different to me, i had a tinker with the one in WIN4AIP some time way back and had forgotten about it, i might have to have another play with it soon to see what it can do.

i noticed a sattelite trail to the lower right, what stacking mode did you use was it average mode, ive being using median of late although i usually run most of them just in case one gives a better result initially, ive personally found median is best about 80% of the time others swear by a sigma variety which might perform better in other programs than i have.

which brings me too how many exposures and length of time for each exposure and the camera.

cheers Alchemy

Tamtarn · #20 28-02-2008, 09:17 AM

Nice one Peter. Like to see you gather some new data on 253 in the future . Agree with some of the others its still a little purple on our LCD and CRT monitors and has vivid harsh blue halos around the stars. Maybe its OK on other monitors.

The weather in Sydney must be frustrating hope you get some clear skies soon to image some new objects

Barb