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ASTRO: An old NGC 1491
I took this 2 years ago. It was the second color image I processed with
Photoshop CS (maybe third my records are vague). So It is in dire need or reworking. I hadn't realized I'd never posted it until John posted his wide field shot. I obviously was still trying to figure out the best exposure times for my sub frames. Most were too short for my sky conditions. A reshoot would be in order but I have hundreds of never taken targets on my to do list so that won't happen for a while. Looking at the 4x10' stack compared to the 12x5' one I see I got more in 40 minutes with 10 minute subs than I did in 60 minutes with 5 minute ones. Going longer would seem even better but then I saturate bright stars too much so have settled on 10' as the best compromise when binned 2x2 as all these were. 14" LX200R @ f/10, L=4x10'+12x5', RGB=4x5', STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
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ASTRO: An old NGC 1491
Beautiful shot Rick. Makes me want to reshoot it. There aren't too many
impressive galaxies in the autumn skies, so I may find the time to do this. Stefan "Rick Johnson" schrieb im Newsbeitrag ster.com... I took this 2 years ago. It was the second color image I processed with Photoshop CS (maybe third my records are vague). So It is in dire need or reworking. I hadn't realized I'd never posted it until John posted his wide field shot. I obviously was still trying to figure out the best exposure times for my sub frames. Most were too short for my sky conditions. A reshoot would be in order but I have hundreds of never taken targets on my to do list so that won't happen for a while. Looking at the 4x10' stack compared to the 12x5' one I see I got more in 40 minutes with 10 minute subs than I did in 60 minutes with 5 minute ones. Going longer would seem even better but then I saturate bright stars too much so have settled on 10' as the best compromise when binned 2x2 as all these were. 14" LX200R @ f/10, L=4x10'+12x5', RGB=4x5', STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#3
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ASTRO: An old NGC 1491
interesting detail
Rick Johnson wrote: I took this 2 years ago. It was the second color image I processed with Photoshop CS (maybe third my records are vague). So It is in dire need or reworking. I hadn't realized I'd never posted it until John posted his wide field shot. I obviously was still trying to figure out the best exposure times for my sub frames. Most were too short for my sky conditions. A reshoot would be in order but I have hundreds of never taken targets on my to do list so that won't happen for a while. Looking at the 4x10' stack compared to the 12x5' one I see I got more in 40 minutes with 10 minute subs than I did in 60 minutes with 5 minute ones. Going longer would seem even better but then I saturate bright stars too much so have settled on 10' as the best compromise when binned 2x2 as all these were. 14" LX200R @ f/10, L=4x10'+12x5', RGB=4x5', STL-11000XM, Paramount ME Rick ------------------------------------------------------------------------ -- John N. Gretchen III http://www.tisd.net/~jng3 |
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