40D - NGC6357 Emission Nebula

Tamtarn · #1 10-06-2008, 05:35 PM

NGC 6357 Emission Nebula in Scorpius

A lineup of four 7th magnitude stars point to the heart of this faint emission nebula.

We found the nebula emits very strong HA colour as we had only red nebula in our subs taken with our unmodded 40D.

I love the foreground stars and have tried to get a feeling of 'shining' stars in our image. Hope you like it.

Barb

Details

Canon 40D Unmodded - Skywatcher 200mm Newt

Captured last Thursday

20 x 7 min lights - 2 x 10 min lights......... 10 x 7min darks - 2 x 10 min darks .......... all ISO 800

Higher resolution :: http://barb.david.1.googlepages.com/home

Click image for larger version

Name: FINAL-NGC6357--[900]-IIS.jpg
Views: 82
Size: 199.2 KB
ID: 43714

skeltz (Rob) · #2 10-06-2008, 05:59 PM

Good going barb and dave,sure does emit a lot of red thats for sure,the four stars captured in a line add another dimension to a already nice image.
Are you thinking about getting a coma correcter one day?
CHEERS

gbeal · #3 10-06-2008, 06:02 PM

Stunning, I love it.
Forget Rob, I reckon it looks good without the coma corrector, LOL.
Gary

Tamtarn · #4 10-06-2008, 07:07 PM

Quote:

Originally Posted by rpsastronomy

Are you thinking about getting a coma correcter one day?

We are already using an MPCC corrector Rob, it was possibly collimation.

Lester · #5 10-06-2008, 07:18 PM

Stunning image, well done.

winensky · #6 10-06-2008, 08:06 PM

Wonderful shot. Coma? Now collimation At f/4-5 I understand... and continuously curse. Not much of that either here. Well done.

skeltz (Rob) · #7 10-06-2008, 08:26 PM

Quote:

Originally Posted by Tamtarn

We are already using an MPCC corrector Rob, it was possibly collimation.

Your probably right there barb and dave,i have learn,t that with mine ,always a bit of tweaking and adjusting.
I don,t reliase sometimes until i take a image and then i go DOH!!

leon · #8 10-06-2008, 08:27 PM

Beautiful capture Barb and Dave, plenty of detail and lovely colour, nice work indeed

Leon

Ric · #9 10-06-2008, 09:02 PM

Great capture Barb & Dave, There is some good detail in the nebulosity and I agree with your comments about the stars, they add a nice dimension and effect to the overall image.

Cheers

Ian Robinson · #10 10-06-2008, 10:02 PM

Wow not bad for an 8" .... can't wait to get my 4OD.

Is there a Deep Space filter (or similar) between the camera and the mirror to cut down on light pollution ?

Next job for me - reassemble the 10" f4.7 newtonian ota.

Alchemy (Clive) · #11 10-06-2008, 10:16 PM

Image looks good, your focus is spot on with the diffraction spikes as sharp as. Youve done really well with the amount of Ha the 40d has captured..... or could it just be good processing. Either way nice

Tamtarn · #12 10-06-2008, 10:37 PM

Quote:

Originally Posted by Ian Robinson

Is there a Deep Space filter (or similar) between the camera and the mirror to cut down on light pollution ?

No light pollution filter used Ian, the only thing between the camera and the secondary mirror is a mpcc coma corrector. Our skies are semi dark.

Hagar (Doug) · #13 10-06-2008, 10:40 PM

Wonderful image Guys. Really a stunner. The detail in the nebula requires a long look.

Really Nice image
well done

jase (Jason) · #14 11-06-2008, 12:37 AM

Great acquisition and processing Barb. Love the four stars in a row. One of my favourite targets. Well done.

Tamtarn · #15 11-06-2008, 10:48 AM

Thanks for the comments Gary Lester Matt Leon and Ric much appreciated

Robert_T · #16 11-06-2008, 11:07 AM

Beautiful, an incredible blend of strength in the colour and delicacy in the detail. I love it

Tamtarn · #17 11-06-2008, 05:18 PM

Quote:

Originally Posted by Alchemy

Image looks good, your focus is spot on with the diffraction spikes as sharp as. Youve done really well with the amount of Ha the 40d has captured..... or could it just be good processing. Either way nice

The subs had only red nebulosity and it took a bit of processing to drag it out and were surprised by how much could be extract with processing. Like to see you do this one with the QHY8 Clive

Quote:

Originally Posted by Hagar

Wonderful image Guys. Really a stunner. The detail in the nebula requires a long look.

Really Nice image
well done

The nebula is very striking Doug once you draw the detail out.

Quote:

Originally Posted by jase

Great acquisition and processing Barb. Love the four stars in a row. One of my favourite targets. Well done.

Thanks Jase. I really loved processing this one

Quote:

Originally Posted by Robert_T

Beautiful, an incredible blend of strength in the colour and delicacy in the detail. I love it

I wondered if I had overdone the colour Robert but it looked pretty striking so I just went with it.