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Jean-Paul Longchamp and the Deep Sky Imager Jean-Paul Longchamp writes of his 47 Tucanae image taken from Tahiti with the Deep Sky Imager and his 10" Meade Schmidt-Cassegrain: "Beautiful jewels lie hidden within the southern sky ... One of my favorites is "47 Tucanae" the finest globular cluster I know. It has a bright but detail-full center with large and progressive extensions. What a challenge for a new imager! The short focal length of my good old MEADE 2120-10"- f/6.3 with an extra 0.63 focal reducer, and the rather large CCD of the Deep Sky Imager, fit perfectly with this object. The challenge is to reveal the stars of the periphery without "burning" the center and show the acute colors of any stars. It was one of my first tries on such an object with the Deep Sky Imager ... I have been really surprised! After focusing with the help of the 'Magic Eye' focus, both the center and the farthest stars were perfectly visible on screen. I chose the following setting: Exposure length 15s; quality 20%; gain 87%; offset 45% and manual contrast with a Shadow enhancement on 5. The software was in charge to stack the images and subtract dark frames... I chose to stop at 45 ... my image was ready! Fabulous! Only a little post processing with a bit more of contrast and saturation ... that's it! The secret? In my opinion, the true16 bit coded images." Happy New Year to you and yours.... La orana i te matahiti api! Jean-Paul Longchamp Tahiti Return back to DSI Gallery Return back to Deep Sky Imager |
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