SimmoW
14-12-2016, 09:38 PM
Thought I'd use a simple title for my post :D
This is the second 'completed' image from the new ASI1600 camera, I'm having problems getting around to processing all its data in a hurry! So this is from way back in late October, from Heathcote, when we evacuated from Vicsouth for better skies.
Full rez image here (https://www.astrobin.com/276192/)
I'm on a massive learning curve with such a flexible and sensitive camera. Guiding is much better but now (esp with the amazing Sharpcap PA software). But I realise my collimation isn't perfect. Need to work out how to adjust the primary mirror of my Tak E-130D, I have a Howie Glatter laser collimator, but when I tried to adjust the primary it wouldn't move. This will explain why the 10 sec stars aren't perfect. Crisp yes, not round though.
I had to use 60 or so 5 second subs for all LRGB filters to remotely get any detail of the core and decent star colours - very pleased with the orange, yellow and large number of blue stars near the core. But the main image used 400 subs of 10 seconds for each of the LRG&B, totalling 4 hours. This meant that all the lovely yellow stars I've seen in other excellent images aren't there. Shortly after this image I learned how to measure ADU....All shots taken at unity gain of 139 and -15c.
I'll look forward to another revisit next year, it's a gorgeous area. Next time I would even push the camera to its limits and try 60 second subs to maximise the number of stars in the background.
Check out the little galaxies in the top-right and lower-left. I love the little one in the lower-left, earlier I found that it had some K designation but can't find the thread again! Anyone know what it is, what it's called?
Fortunately integrating each 400 sub image went well in PI, approx an hour of processing on my good old i7.
C&C welcome
This is the second 'completed' image from the new ASI1600 camera, I'm having problems getting around to processing all its data in a hurry! So this is from way back in late October, from Heathcote, when we evacuated from Vicsouth for better skies.
Full rez image here (https://www.astrobin.com/276192/)
I'm on a massive learning curve with such a flexible and sensitive camera. Guiding is much better but now (esp with the amazing Sharpcap PA software). But I realise my collimation isn't perfect. Need to work out how to adjust the primary mirror of my Tak E-130D, I have a Howie Glatter laser collimator, but when I tried to adjust the primary it wouldn't move. This will explain why the 10 sec stars aren't perfect. Crisp yes, not round though.
I had to use 60 or so 5 second subs for all LRGB filters to remotely get any detail of the core and decent star colours - very pleased with the orange, yellow and large number of blue stars near the core. But the main image used 400 subs of 10 seconds for each of the LRG&B, totalling 4 hours. This meant that all the lovely yellow stars I've seen in other excellent images aren't there. Shortly after this image I learned how to measure ADU....All shots taken at unity gain of 139 and -15c.
I'll look forward to another revisit next year, it's a gorgeous area. Next time I would even push the camera to its limits and try 60 second subs to maximise the number of stars in the background.
Check out the little galaxies in the top-right and lower-left. I love the little one in the lower-left, earlier I found that it had some K designation but can't find the thread again! Anyone know what it is, what it's called?
Fortunately integrating each 400 sub image went well in PI, approx an hour of processing on my good old i7.
C&C welcome