Author Topic: Another M27  (Read 3870 times)

0 Members and 1 Guest are viewing this topic.

mickw

  • Exile Under Darker Skies
  • R.I.P.
  • Galaxy Cluster
  • *
  • Posts: 5683
Re: Another M27
« Reply #15 on: Jun 23, 2008, 08:37:20 »
Nice work Mark, certainly a worthwhile mod.

I wasn't expecting the difference to be quite so dramatic
Growing Old is mandatory - Growing Up is optional

Fay

  • O. A. S.
  • Galaxy Cluster
  • *
  • Posts: 9170
    • Faysastroimages
Re: Another M27
« Reply #16 on: Jun 23, 2008, 08:56:06 »
Mark, that is really good. A very good improvement.

I tried to do NGC888 & the Veil. I have tried a couple of times, but have assumed, as the image is quite light & all over red, that the sky is too bright at the moment. Although a lot of red is expected in that area.

I was testing all evening to see how I could get a reasonable frame regarding lightness. Around 12.30, I tried out a 600 sec of NGC888. It was the darkest it had been, but very red all over.

Do you think I should alter the red component, even though I was in a very red area? Also, do you use Photoshop for processing? I am not sure how to use the levels & curves with  RGB all in the same frame.


Fay
It is healthier to be mutton dressed as lamb, than mutton dressed as mutton!

Fay

  • O. A. S.
  • Galaxy Cluster
  • *
  • Posts: 9170
    • Faysastroimages
Re: Another M27
« Reply #17 on: Jun 23, 2008, 08:58:51 »
Mark, I will sort myself out & put the image on the forum. I did various times during the evening, but feel for Ha I need the longer exposures.
It is healthier to be mutton dressed as lamb, than mutton dressed as mutton!

MarkS

  • O. A. S.
  • Galaxy Cluster
  • *
  • Posts: 7292
Re: Another M27
« Reply #18 on: Jun 23, 2008, 09:30:43 »
Fay,

What you are describing is exactly what I found last night - the background was quite red (even with a CLS filter) and all the stars were very red.  This is exactly what you expect to find with a modded camera.  This is why I scaled back the red channel using RGB balancing.  I don't use Photoshop (except on rare ocasions) but I'm sure there must be an equivalent way to re-adjust the balance of the  RGB channels.

Mark

Fay

  • O. A. S.
  • Galaxy Cluster
  • *
  • Posts: 9170
    • Faysastroimages
Re: Another M27
« Reply #19 on: Jun 23, 2008, 09:34:36 »
I used a CLS filter as well. Earlier on I did some exposures with 0.8 FR, but decided to take it off.They were so light.
It is healthier to be mutton dressed as lamb, than mutton dressed as mutton!

Rocket Pooch

  • Non-OAS
  • Galaxy Class
  • *
  • Posts: 5027
Re: Another M27
« Reply #20 on: Jun 24, 2008, 18:44:09 »
Oh, I like the after.

Mark/Fay I HAVE A 2" FILTER I HAVE NOT USED YET (BAARDER UHC-S), YOU CAN BORROW IT... 


But you house is subject to repossession if you do not return the filter in original condition.


HINT!!!!!!!!!!!!!!!!!!!!!!!!!!

MarkS

  • O. A. S.
  • Galaxy Cluster
  • *
  • Posts: 7292
Re: Another M27
« Reply #21 on: Jun 25, 2008, 05:43:45 »
The "after" image with slightly more sympathetic processing.  The bluish star right at the centre is more obvious now.

« Last Edit: Jun 25, 2008, 06:24:14 by MarkS »

Fay

  • O. A. S.
  • Galaxy Cluster
  • *
  • Posts: 9170
    • Faysastroimages
Re: Another M27
« Reply #22 on: Jun 25, 2008, 08:15:01 »
Mark, fantastic perfect image, camera mod obviously paid off.
Can't believe the time you were up, this morning!
It is healthier to be mutton dressed as lamb, than mutton dressed as mutton!

MarkS

  • O. A. S.
  • Galaxy Cluster
  • *
  • Posts: 7292
Re: Another M27
« Reply #23 on: Jun 25, 2008, 08:57:32 »

Thanks Fay, I'm pretty pleased with the result.

I'm looking forward to some images from your modded 350D ...

Mike

  • Observing Consultant
  • O. A. S.
  • Galaxy Cluster
  • *
  • Posts: 8501
    • Electronicle
Re: Another M27
« Reply #24 on: Jun 25, 2008, 10:03:41 »
Nice one Mark.
We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology. Carl Sagan

JohnP

  • Guest
Re: Another M27
« Reply #25 on: Jun 25, 2008, 11:07:48 »
Mark - that does look good - once you get your guiding sorted it'll be excellent.... John

Rick

  • Administrator
  • Galaxy Cluster
  • *
  • Posts: 6438
    • http://www.orpington-astronomy.org.uk
Re: Another M27
« Reply #26 on: Jun 26, 2008, 11:18:12 »
Today's APOD image makes an interesting comparison:

http://apod.nasa.gov/apod/ap080626.html

MarkS

  • O. A. S.
  • Galaxy Cluster
  • *
  • Posts: 7292
Re: Another M27
« Reply #27 on: Jun 26, 2008, 12:17:24 »

That's a beautiful APOD image.  But he has an unfair advantage by using a robotic telecope in Hawaii !

Ian

  • Administrator
  • Galaxy Class
  • *
  • Posts: 3399
Re: Another M27
« Reply #28 on: Jun 26, 2008, 12:55:15 »
does that mean you don't consider yours to be robotic?

Anyway, who needs Hawaiian skies? Take advantage of the sky glow to get shorter exposures. More time drinking beer :)

Rocket Pooch

  • Non-OAS
  • Galaxy Class
  • *
  • Posts: 5027
Re: Another M27
« Reply #29 on: Jun 27, 2008, 10:09:50 »
I'm in wales next week, so you should have clear skies Tues/Wed