NGC2237 Rosette Nebula in HOO

 Posted: Feb 16th, 2022
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NGC
IC
HD
Technical Info
Telescope/Lens: Newton 150/750
Camera: RisingCam 571C
Mount: HEQ5 Pro (Rowan belt modification)
Guide Scope: Pentax Takumar 200/4
Guide Camera: T7M Astro
Software: APT, PHD2, Siril, Topaz Denoise AI, Starnet++, Luminar
Accessories: Комакорректор Sharpstar 0.95x
Exposure:
90 x 120" ISO/Gain: 100 - Optolong l-eXtreme
Orange zoneLight Pollution:
 Krasnoznamensk, Russia
 Feb 15th, 2022
3 h 0 m
1694
Hooray! The first night suitable for shooting since the beginning of December. Never mind that it was a full moon and I was shooting about 20 degrees from the Moon. The raw frames were scary to look at, but after some gradient work in HOO, it came together nicely. And yes, Starnet++ version 2 is absolutely brilliant—everyone should download it immediately!
Resolution: 5376x4032 px
Scale: 3776 KB
Updated
  17 Apr, 2022
  3 h 20 m
Пока облака, пересобрал Розетку с использованием эзотерических формул для вытаскивания кислорода. Спасибо команде Siril за Pixel Math в новой версии, его сильно не хватало. Сами формулы на ненашенс...
Current photo
  16 Feb, 2022
  3 h 0 m
Ура-ура! Первая пригодная для съемки ночь с начала декабря. Не считая того, что было полнолуние и снимал градусах в 20 от Луны ) На исходники было страшно смотреть, но после некоторых прыжков с гра...
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Comments

Very nice!
But the full size could be slightly reduced—to match the image resolution with the level of detail.
17 Feb, 2022 Reply
Bootlegger Replied to Bender B Rodriguez
My system has a resolution of about 1" per pixel, which is roughly normal sampling. What benefit would there be from resampling the image?
17 Feb, 2022 Reply
Bender B Rodriguez Replied to Bootlegger
Not compression, but a reduction in pixel size.
17 Feb, 2022 Reply
Bender B Rodriguez Replied to Bootlegger
Very roughly speaking, if the minimum size of visually significant details is 3 pixels, then the image can be reduced by a factor of 3 without losing the perception of those details. In doing so, all single-pixel noise will disappear, and contrast will form naturally.
17 Feb, 2022 Reply
Bootlegger Replied to Bender B Rodriguez
This is essentially performing 2x2 or 3x3 binning in software. You can experiment with it.
17 Feb, 2022 Reply
Bender B Rodriguez Replied to Bootlegger
Not exactly. Binning still occurs on monochrome CCD matrices before the ADC and serves to amplify the signal, but overall, the analogy probably works.
For the megapixels of a color camera, you either need to take the square root or trust somewhat deceptive algorithms like VNG.
17 Feb, 2022 Reply

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