Ngc 2556, Ic 2375, Ic 2377, Ic 2379

rogerg (Roger) · #1 02-02-2006, 01:36 AM

Well, I thought I'd better not dissapear now that I've posted one image, and instead post tonight's results (one image from tonight, one processed tonight from the 27th).

These IC objects make quite a nice set:
http://www.rogergroom.com/rogergroom...m.jsp?Item=254

I'm tackling PE problems so theres some guiding issue in RA. Have done a few correction runs, but issues are still persisting for some reason.

And this NGC 2556 I find interesting for the just-visible detail around the edge of the galaxy. Perhaps other have a better image of this guy, mine has some noise problems.

http://www.rogergroom.com/rogergroom...m.jsp?Item=255

Not sure about the dot that appears to have moved in the bottom left, doesn't look like dust/noise, but yet to investigate in detail.

Roger.

atalas · #2 09-02-2006, 04:00 PM

Nice work John ,lots of detail ! well done .

davidpretorius · #3 09-02-2006, 04:53 PM

that is a great little triplet!!!

well done, i like em

PhotonCollector (Paul) · #4 10-02-2006, 10:19 AM

Hi Rogerg,

Gee I like your images. Magnitude 20 objects eh? it reminds me of the days when I was using my homemade CCD imager (the Cookbook CCD) and getting Magnitude 19 galaxies with just a few minutes exposure on a 8-inch telescope.

It makes me wonder if I have gone backward with a Digital SLR - now I have a 12-inch telescope and even with 50minute exposures I can only just reach those faint Mag. 19+ objects.

regards

[1ponders] (Paul) · #5 10-02-2006, 06:11 PM

Deep stuff Rogerg.

rogerg (Roger) · #6 11-02-2006, 03:38 PM

Paul,

I will hopefully have a 350D by the end of March and one thing I am really keen to test out is exactly how they compare in light capturing capabilities to the SBIG. I'm sure the NABG ST7 must capture a lot more light than the 350D will, but then I look at the spectacular colour images people get from the DSLR's and wonder if they are actually quite comparable. It's interesting to hear your comment.

Cookbook CCD - been a while since I've heard that name. I started out in astronomy when they were around, late 90's. I never had the chance to buy one before webcams became popular and I got one of them instead.

I suppose the thing with the DSLR's is they produce pretty images for low cost, as compared to 'deep' images the SBIG style cameras produce. And I guess for a good looking image it doesn't matter what the limiting magnitude is as long as there's some nice detail and colour visible.

Roger.

Quote:

Originally Posted by PhotonCollector

Hi Rogerg,

Gee I like your images. Magnitude 20 objects eh? it reminds me of the days when I was using my homemade CCD imager (the Cookbook CCD) and getting Magnitude 19 galaxies with just a few minutes exposure on a 8-inch telescope.

It makes me wonder if I have gone backward with a Digital SLR - now I have a 12-inch telescope and even with 50minute exposures I can only just reach those faint Mag. 19+ objects.

regards

PhotonCollector (Paul) · #7 13-02-2006, 09:37 AM

Quote:

Originally Posted by rogerg

Paul,

I will hopefully have a 350D by the end of March and one thing I am really keen to test out is exactly how they compare in light capturing capabilities to the SBIG. I'm sure the NABG ST7 must capture a lot more light than the 350D will, but then I look at the spectacular colour images people get from the DSLR's and wonder if they are actually quite comparable. It's interesting to hear your comment.

Cookbook CCD - been a while since I've heard that name. I started out in astronomy when they were around, late 90's. I never had the chance to buy one before webcams became popular and I got one of them instead.

I suppose the thing with the DSLR's is they produce pretty images for low cost, as compared to 'deep' images the SBIG style cameras produce. And I guess for a good looking image it doesn't matter what the limiting magnitude is as long as there's some nice detail and colour visible.

Roger.

Geeday Roger,

You are correct that the DSLR can produce pretty pics for a low cost and it doesn't matter what the limiting mag. is. I suppose ideally us astrophotographers need two cameras. A filter-modified DSLR for those big clouds of nebulae, and a Monochrome CCD Camera for those distant/small galaxies.

Best Regards
Paul

ving (David) · #8 13-02-2006, 12:56 PM

great pics of unfamiliar objects.... mag 20!

rogerg (Roger) · #9 13-02-2006, 06:51 PM

Ideal - I'd suggest the ideal would be a ST1100 with filter wheel ... now that would be ideal. My little greyscale ST-7, that's not idea :-)

Roger.

Quote:

Originally Posted by PhotonCollector

Geeday Roger,

You are correct that the DSLR can produce pretty pics for a low cost and it doesn't matter what the limiting mag. is. I suppose ideally us astrophotographers need two cameras. A filter-modified DSLR for those big clouds of nebulae, and a Monochrome CCD Camera for those distant/small galaxies.

Best Regards
Paul