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Takahashi FSQ106ED and Bortle 2/3 skies
Posted: Tue Jul 21, 2020 11:30 pm
by oopfan
I didn't take these. I downloaded them. They were taken at a remote site in Spain with a Takahashi FSQ106ED at f/3.6 and a QSI camera.
We can dream can't we?
These are single frames: one each of Ha, R, G, B with exposures 600s, 900s, 900s, 900s, respectively.
Brian
- horsehead-1x600s-Ha-bin1-Pier6-Takahashi-FSQ106ED-f3.6.jpg (101.73 KiB) Viewed 10199 times
- horsehead-1x900s-Red-bin1-Pier6-Takahashi-FSQ106ED-f3.6.jpg (123.89 KiB) Viewed 10199 times
- horsehead-1x900s-Green-bin1-Pier6-Takahashi-FSQ106ED-f3.6.jpg (115.42 KiB) Viewed 10199 times
- horsehead-1x900s-Blue-bin1-Pier6-Takahashi-FSQ106ED-f3.6.jpg (109.34 KiB) Viewed 10199 times
Re: Takahashi FSQ106ED and Bortle 2/3 skies
Posted: Mon Jul 27, 2020 9:58 pm
by turfpit
Brian
I downloaded the data from the home page and spent 2 days developing my APP skills. Incredible detail from Bortle 2/3 skies. As usual with imaging, no gain without pain. This is what I managed to produce.
- IC434-HaLRGB_R-12x900s_G-9x900s_B-12x900s_Ha-20x600s.jpg (226.24 KiB) Viewed 10165 times
- IC434_Ha-20x600s.jpg (142.55 KiB) Viewed 10165 times
I had to experiment stacking different numbers of RGB frames in order to get the colour balance right. Also a synthetic L frame was generated by combining Ha, R, G, B stacks, described here
https://www.astropixelprocessor.com/har ... olonnello/.
The camera used for capture was a QSI 683ws (KAF 8300 sensor). 20 darks, 20 bias and 10 flats were used with each filter. APP performed flawlessly handling this data.
Alnitak is troublesome with these exposure lengths and currently beyond my processing capabilities but I am satisfied with the range of colours and Ha detail.
Dave
Re: Takahashi FSQ106ED and Bortle 2/3 skies
Posted: Mon Jul 27, 2020 10:37 pm
by oopfan
Great work Dave! You are the APP wizard.
Brian
Re: Takahashi FSQ106ED and Bortle 2/3 skies
Posted: Mon Jul 27, 2020 11:06 pm
by turfpit
Not really Brian - I used all the default settings in APP.
Dave
Re: Takahashi FSQ106ED and Bortle 2/3 skies
Posted: Mon Jul 27, 2020 11:58 pm
by oopfan
Fair enough but you knew what buttons to press in the proper order!
Brian
Re: Takahashi FSQ106ED and Bortle 2/3 skies
Posted: Wed Jul 29, 2020 10:35 am
by turfpit
After some 'support & encouragement' from Brian I have settled on this one. This is the 9th version (9th attempt at processing the stacks) - better framed and finally managed to grasp removal of light gradients in APP. In the end, more was achieved with less processing. The final step was to denoise with Neat Image.
- IC434-HaLRGB-resized.jpg (227.05 KiB) Viewed 10137 times
Dave
Re: Takahashi FSQ106ED and Bortle 2/3 skies
Posted: Wed Jul 29, 2020 5:20 pm
by oopfan
A really stunning image, Dave! I see that it is really racking up the views, likes, and comments at AstroBin.
Brian