Sorry this is a little of topic, but I don't know anywhere better to ask. Is it possible to do a flatfield calibration using Photoshop CS2? If so how?

I got another clear evening Monday so I tried for the dark nebulas around this region. The colors I believe are muted due to extinction (and lack of processing...

Hello! Here is my first M16 image and one of the few taken with my new QHY2Pro CCD camera (1.4 MP). Really amazing nebula! Taken on July, 01, 2008 from...

from the 400mm pentax f/4 lens and Proline 9000 camera. only 90minutes total exposure (9 x 10 minutes) the comatic looking tails behind the stars in the...

NGC 5906 is sometimes known as the "Splinter Galaxy". This was taken through clouds with a half moon in the sky back in April. I only managed 30 minutes of...

just a quick processing of the Halpha and data from last night. I am still having a bit of a spacing problem with the new camera. the sensor height must be...

This was sort of a test with a Olympus 28mm Zuiko lens. I stopped it down to f/4 and just shot two images. I like this lens enough that I want to go back and...

this came out a little better: more signal, 9 x 10 minutes binned 2x2 from the Stinger 450 at 5760mm focal length and f/12.6 halpha from baader, pl9K from...

no, I am not making sulfuric acid.... this is S2HaO3 instead of H2SO4 g The stars were terribly elongated in the sulfur channel, which was acquired while...

3x600 seconds Intes MK-69 (6" f/6 Mak-Cass 900mm fl) Celestron CI-700 Mount w/Gemini QHY8 CCD Camera reduced 50% -- John N. Gretchen III N5JNG NCS304

I realize we're in Solar minimum at the moment, but I was wondering if anyone is still taking regular pics anyway. Ideally, I'm hoping for recent images of...

One thing interesting about this image is that it contains two of the three PNs I have discovered. I have included a markup of the image with the PNs marked...

....or Barnard's E. This is about 12 minutes of data that I was able to get before the haze/humidity moved in and ruined everything. Modded Canon XTi with a...

Finally this is starting to take shape It is at about 8 hours of exposure I am finding a number of issues that need to be investigated. Mostly it seems that...

finally I was able to take a bit more data etc. http://www.narrowbandimaging.com/ngc6334_and_ngc6337_P400_PL9K_Baader_ha_FLI_O3_S2_page.htm it is a total of...

210 minutes of halpha and 60 minutes of o3 I need a lot more O3 and then I need some S2

6x600 seconds Intes MK-69 (6" f/6 Mak-Cass 900mm fl) Celestron CI-700 Mount w/Gemini QHY8 CCD Camera cropped -- John N. Gretchen III N5JNG NCS304 ...

Weather is trying to give me a night or two but while seeing is fair transparency is awful. Seems like most on my list are faint. So I need better...

Also known as NGC 5394 (head and neck), NGC 5395 (body) and SDSS J123826.24+372708.7 (fish) Arp 84 only includes the first two which are about 160 million...