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Hello All, sharing with you my latest complete image, the War and Peace Nebula, NGC6357. NGC 6357 is about 5500 light years away in the constellation Scorpius near the better known NGC 6334, AKA the "Cat's Paw" or "Bear Paw" nebula. This nebula was also given the name War and Peace Nebula because of its appearance in infrared images, the bright western part resembles a dove and the eastern part looks like a skull. This photo was taken through a Celestron C8 8" SCT at f6.3 (1280mm focal length), tracked on the CGEM and exposed using a full spectrum modded and cooled Canon 40D DSLR. Total exposure time through the SII, HAlpha and OIII filters was 40 hours. Clear Skies MG
Hi Astronomers, Sharing with you my latest image of NGC 6357 in the constellation Scorpius near the better known NGC 6334, AKA the "Cat's Paw" or "Bear Paw" nebula. This nebula was also given the name War and Peace Nebula because of its appearance in infrared images, the bright western part resembles a dove and the eastern part looks like a skull. This photo was taken through my Celestron 8" SCT at f6.3 (1280mm focal length), tracked on a CGEM and exposed using my full spectrum modded and cooled Canon 40D DSLR. This image was a bit of an experiment to see how much improvement in noise and sensitivity will be in my long exposed subs after I redesigned the cooling system on my DSLR.. now the sensor temperature was kept at freezing point. When uncooled the sensor temperature was around 27°-32°C and the first version of the cooling system only cooled and kept the sensor temperature at +/- 1°C of ambience... now with the redesigned cooler, I had the temperature drop to -5°C (from 18°C ambient temp) during test and set the controller to stop cooling at 0°C and start cooling at 1°C when imaging this object. The improvement in subs was substantial, 1800 second ISO1600 subs had almost no noise, only few pure white single pixels of noise within the subs, easily removed with single pixel noise reduction, so I'm more than happy with how my 40D is cooled and the subs it's delivering. This image consists of only my SII and HAlpha subs so it is still a work in progress as I still need to expose the OIII subs to add to the SII and HAlpha frames. The was I assembled the channels was by using the red channel in SII as RED, red channel in HAlpha as GREEN and a added combination of the faint signal captured in both blue channels of SII and HAlpha (Hbeta signal) as BLUE. Clear Skies, MG
Astrophotography Scrapbook Vol. 1 Cover Page Lagoon Nebula in Sagittarius ( Messier 8, NGC 6523 ) The Fighting Dragons of Ara ( NGC 6188 ) War and Peace in Scorpius ( NGC 6357 ) Spiral Galaxy NGC 6744 in Pavo Ptolemy's Cluster in Scorpius ( Messier 7, NGC 6475 ) A Million Stars in the Deep South ( NGC 104, 47 Tucanae ) A Wishing Well in Carina ( NGC 3532 ) A Beehive in the Southern Sky ( NGC 2516 ) The Sliver Coin in Sculptor ( NGC 253 ) The Great Nebula in Orion ( Messier 42, NGC 1976 ) A Cluster of Pearls in Centaurus ( NGC 3766 ) - new 5 Dec resources: Scrapbook Template ------------------------------------- When I show my astrophotography images to my friends and family they invariably want to know what they are looking at. This led me to wonder if there was a way I could display my images on a single page together with a few notes on the target object as well as few technical details of the capture for those who might be interested. What I came up with a "scrapbook" like page that combines all of these three elements in a single PDF sheet ( or jpeg image) that ultimately I might combine together to form a PDF book that I can share online or send to friends and family. In the meantime, I thought I might post in this thread each page of my work-in-progress towards volume 1 of my Astrophotography Scrapbook. Any and all comments, observations, suggestions and constructive criticisms will be warmly received. Cheers Mike ps. The pages have been sized to fit full screen on an IPAD