Rosette Nebula

bloodhound31 · #1 18-01-2009, 03:31 AM

10 x 8 minute subs, guided. Darks subtracted. (Stuffed my lights)

Orion Starshoot Pro DSI

Skywatcher ED 120 Prime focus F7.5

Stacked and processed with MaxIm and Photoshop elements with Noels actions.

Baz.

Alchemy (Clive) · #2 18-01-2009, 08:23 AM

you have captured some detail, but you have bumped up the red channel to try to increase the nebulosity, perhaps a bit too much.

its a challenging object as the nebulosity isnt as bright as say M8 so is a bit harder to bring up to that level.

cheers clive.

Garyh · #3 18-01-2009, 08:28 AM

Lookin good Baz, focus etc looks good but you have a very red cast to the whole image as what Clive has mentioned. I had a play ( hope you don`t mind) to pull the red channel in line with the green/blue but wasn`t real successful.
Other than that Well done!

cheers Gary

Omaroo (Chris Malikoff) · #4 18-01-2009, 08:29 AM

Lots of detail Baz, but way too saturated I suspect. I hope you don't mind, but I've attached a really quick rework that has toned it down a bit so that you can see the ring (rosette) shape of the nebula. I've also altered the white point so the stars are a little whiter than they were.

You've got the original high-resolution data there so maybe you can tweak it a little to get a better result than I could off your jpeg.

Hagar (Doug) · #5 18-01-2009, 11:13 AM

Lots of detail Baz but it is a bit on the red side. It is up close and personal but would look better toned down a bit.

Nice capture

anthony.tony · #6 18-01-2009, 04:14 PM

Nice one.

peeb61 (Paul) · #7 18-01-2009, 04:33 PM

Nice Barry,
This object is on my list of targets to capture, it's good to see what setting you have used to give me an idea.

Great work
Paul

leon · #8 18-01-2009, 04:40 PM

Hmmm what else to say , but a fine effort Chris, yea, it is a bit staurated, but the detail and fine guiding is there, nice going.

Leon

RobF (Rob) · #9 18-01-2009, 04:43 PM

Have to agree way too red.
Chris' rework shows you've got great data there to play with though.

bloodhound31 · #10 18-01-2009, 06:44 PM

Thanks guys. Thanks Chris. Yes, I agree on the red. The first image out of this camera I clipped so much red, the black really hid lots. In the last Horsey and now the Rosette, I have overcompensated I think in an attempt to keep the fainter data. I guess I will have to sacrifice something then huh?

Baz.

bloodhound31 · #11 18-01-2009, 08:33 PM

OK, I did an image search on the Rosette and came up with sooooo many different versions! It makes me think that no-one really knows what color it should be!

I reprocessed with Elements and came up with these two. C&C welcome.

Baz.

Hagar (Doug) · #12 18-01-2009, 08:38 PM

The red one is much better Barry, lots of detail and depth.

Lester · #13 18-01-2009, 08:38 PM

The second to last image Baz is very nice. Keep playing with the processing, there are so many ways of doing it.

bloodhound31 · #14 18-01-2009, 08:47 PM

Thanks Doug and Lester.

Doug, the Rosette on your website is very nice BTW.

What I want to know is, how do people get the different colours within the same nebula like they do?

All my shots come out naturally red, with very yellow stars. My stars always look fake by the time I have adjusted all the levels to bring out the rest of the nebulosity detail. The natural blue colour of the stars seems to be an impossible task.

I am shooting prime focus, no filters. Is it the filters people use that change the colours?

Baz.

Lester · #15 18-01-2009, 08:59 PM

Baz are you shooting from a light polluted area; within Canberra?

If so you may need to use some kind of filter. I don't have any false colour problems from dark skies.

Hope someone can help you.

bloodhound31 · #16 18-01-2009, 09:33 PM

Thanks Lester. Canberra, like any city has some light pollution. Not too bad though. I don't use a LP filter. Don't have one for the new scope.

Any idea what effect one would have?

Here's another one stacked with DSS, then a quick photoshop.

Baz.

bluescope · #17 18-01-2009, 11:34 PM

Baz all the data is there ... you probably should try a LP filter ... light polution is light polution no matter how small. Canberra would have a fair bit from street lights and CBD etc. I am living 80kms from Perth, a bigger city than Canberra, but last night with cloud cover I could clearly see the glow of those millions of lights over the hill behind me. Glad to be out of that

atalas · #18 19-01-2009, 06:18 PM

Looking good Baz !

bloodhound31 · #19 20-01-2009, 08:46 PM

Thanks Louie.

I got another couple of hours last night and added them to it. Would I be wasting my time aquiring more subs? If not, should they all be the same length of exposure?

Here you go.

bloodhound31 · #20 21-01-2009, 12:16 AM

This processing is hard! I have no idea what bbuttons I am pushing. Here's a couple more......