MarsG76

This is a RGB image of the Tarantula Nebula taken with a 8" SCT at 2000mm. 12 x 5 mins Subs 5 x 10 mins subs 10 x 1 min subs all at ISO800

Horsehead and Flame nebulae around the star "Alnitak" in "Orion's Belt" in the constellation of Orion. The nebulae are located approximately 1350LY for Flame nebula and 1500LY for the Horsehead curtain glow nebula. Alnitak is a bit closer at about 1250LY and is the source of light for the glow of the nebulae. The Horsehead nebula is a cold dark nebula silhouetted against the pink hydrogen alpha emission nebula IC434. The Horsehead shape is just the shape of the nebula that blocks that part hydrogen emission of IC434. This image was taken using a full spectrum modded Canon 40D. Image consists of Hbeta, HAlpha and OIII data as well as RGB taken through IR cut and neodymium filters across multiple nights in November and December 2015.

The whole Orion's Sword in RGB and 30% HOO added to the channels. This image was taken with a modded Canon 40D through a 80mm F6.25 (500mmFL) Bosma Beta RE Refractor.

Image of the whole of Orions Sword in RGB using a 80mm f6.25 doublet refractor. I captured an hour of 210 second subs, an hour of 180 second subs, 30 mins of 30 second subs and 15 minutes of 15 second subs all on a full spectrum modded Canon 40D at ISO800. For the final processing I selected only the best subs which was about 2 hours 15 minutes of data.

Jupiter Reporcessed from 17th February 2015 data captured with a Celestron Skyris 618C through a Baader Moon & Skyglow Filter and a 2X Celestron Barlow through a Nexstar 8SE using Firecapture.

The Dumbell Nebula - M27 This image is a composite of a RGB exposure and 50% HAlpha mixed into the red channel and 50% of OIII mixed into the green and blue channels. Imaged September/October 2015 on a Celestron Nextstar 8SE, CGEM mount, modded Canon 40D at f10 (2032mm).

This is a reprocessed image of the Sculptor Galaxy Data I captured and posted previously. During the week when I was imaging the Helix Nebula, I was exposing it when it was east of the meridian. So as it hit 15 degrees past the meridian and the meridian flip happened, there was no guide star in the OAG FOV so I had the option to pack up and continue imaging another day or try for another object and hope for a guide star. As the sculptor galaxy was close to the location I slewed to it (with favour western horizon selected in the CGEM settings) and to my joy when the sculptor galaxy was framed a 1/3rd of the frame to the edge there was a guide star in the OAG... WOO HOO :grin: ... and so a second object imaging continued. After getting 3 nights worth of ISO400 10 minute RGB subs, I found that after processing the image was very amber at best.. almost sepia... and no matter what I done to it it always looked too green or purple at certain parts... just didn't look right. When I eventually got a chance, I was going to image some pure blue subs to add to the image to correct for the amber look, but as luck would happen, forecast was for at least a week of clouds and rain... this week was no better BUT I did see a break in clouds the other day with a 3/4 FULL MOON!!!! :mad: I couldn't afford to let this opportunity go to waste so I imaged NGC253 through a Halpha filter to cut out the moon glow... remembering that when imaging through Halpha in the 40D there is a lot of data in red (of course) and about 30% as bright in the blue channel.... I thought that I could use that added to blue as well as add some halpha to red and perhaps reveal some nebulosity. I only managed 8 x 15 minute subs before clouds started coming and 4 out of those were usable.

This is a reprocessed image of the Helix Nebula Data I captured and posted previously. This image has been exposed across 4 nights, 2 nights through a HAlpha filter and 2 nights through a OIII filter using my modded 40D. Helix nebula is fainter than I thought it was going to be, I had to image it at ISO800 30 minute HAlpha subs and ISO1250 OIII 30 minute subs, total of 8 hours through each through my 8" SCT at F10. I just wish I captured more clearly the comet shock waves visible in the Hubble images... But overall I'm happy with how it came out... As always there is room for improvement...