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#81
Updates and Upsets / This is a test...
Last post by Rick - Sep 24, 2024, 16:56:10
This is only a test. 
#82
Astrophotography / Re: Three darks and one no so ...
Last post by Carole - Sep 21, 2024, 16:33:09Think the final version looks a good improvement Roberto.
#83
Astrophotography / Re: Three darks and one no so ...
Last post by Roberto - Sep 21, 2024, 10:53:02I've reprocessed the LRGB once more. Now from scratch, starting with the RGB and adding the new L, instead of adding the new L to the old LRGB...I think this is it. Won't do more to that data.
Full resolution here: https://cdn.astrobin.com/thumbs/ItWpcw5cyggQ_16536x0_PBe27Uwd.jpg
Roberto
Full resolution here: https://cdn.astrobin.com/thumbs/ItWpcw5cyggQ_16536x0_PBe27Uwd.jpg
Roberto
#84
Astrophotography / Re: Seahorse Nebula (Barnard 1...
Last post by Roberto - Sep 21, 2024, 10:49:02Great comeback image Mark! 
Your Tak is perfectly suited to that chip 
Roberto
Your Tak is perfectly suited to that chip Roberto
#85
Astrophotography / Re: Seahorse Nebula (Barnard 1...
Last post by Carole - Sep 20, 2024, 15:38:39QuoteWhen this Altair Astro first came out it cost £2800 and now it is down to £1950 brand new and even cheaper second-hand, so now was the time to take the plunge.OMG, I thought CMOS cameras were supposed to be cheaper than CCD cameras and why every-one goes for them.
QuoteThe processing was very easy, which is what I expected because I'm familiar with the data quality from the Nikon Z6. The only gotcha is to not use dusk sky flats because the spectral content (very blue) causes weird radial gradients which I believe are caused by colour pixel crosstalk i.e. a certain number of photons that enter a sensor pixel of one colour, skip across pixel boundaries to create an electron in a neighbouring pixel of the wrong colour.
I don't have these problems, probably because I use Mono, no real experience of colour dedicated cameras exept for a QHY8L I bought for a short while. Didn't get on woth it at all and went back to Mono.
Carole
#86
Astrophotography / Re: Seahorse Nebula (Barnard 1...
Last post by MarkS - Sep 20, 2024, 07:26:42Thanks Carole. I've taken very few images recently and those I've taken I have ended up not been pleased with for one reason or another - mainly because the internal processing DSLR/Mirrorless cameras apply to the raw data causes artifacts to appear. I've been biding my time waiting for full-frame colour cameras to reach a low enough price point.
When this Altair Astro first came out it cost £2800 and now it is down to £1950 brand new and even cheaper second-hand, so now was the time to take the plunge.
The processing was very easy, which is what I expected because I'm familiar with the data quality from the Nikon Z6. The only gotcha is to not use dusk sky flats because the spectral content (very blue) causes weird radial gradients which I believe are caused by colour pixel crosstalk i.e. a certain number of photons that enter a sensor pixel of one colour, skip across pixel boundaries to create an electron in a neighbouring pixel of the wrong colour.
Mark
When this Altair Astro first came out it cost £2800 and now it is down to £1950 brand new and even cheaper second-hand, so now was the time to take the plunge.
The processing was very easy, which is what I expected because I'm familiar with the data quality from the Nikon Z6. The only gotcha is to not use dusk sky flats because the spectral content (very blue) causes weird radial gradients which I believe are caused by colour pixel crosstalk i.e. a certain number of photons that enter a sensor pixel of one colour, skip across pixel boundaries to create an electron in a neighbouring pixel of the wrong colour.
Mark
#87
Astrophotography / Re: Three darks and one no so ...
Last post by Roberto - Sep 19, 2024, 18:00:23Indeed Carole. The RGB image alone is better than the LRGB one. I will leave it at that for now.
Thanks
Roberto
Thanks
Roberto
#88
Astrophotography / Veil complex (re-work)
Last post by Carole - Sep 19, 2024, 16:29:51I have done a re-work of this as was never happy with the original process.
Original Process from 2020:
New process using SX:
Original Process from 2020:
New process using SX:
#89
Astrophotography / Re: Seahorse Nebula (Barnard 1...
Last post by Carole - Sep 19, 2024, 16:14:21Wow, Mark, two surprises.
a) You are still imaging as not heard from you for a while.
b) You have bought a dedicated astro camera. Most people cool theirs to - 10 or even more, depending on the ambient temperature.
How did you find it, obviously you have mentioned the concentric circles.
I love this image and it also includes the Fireworks Galaxy.
Great result showing some Ha regions too.
a) You are still imaging as not heard from you for a while.
b) You have bought a dedicated astro camera. Most people cool theirs to - 10 or even more, depending on the ambient temperature.
How did you find it, obviously you have mentioned the concentric circles.
I love this image and it also includes the Fireworks Galaxy.
Great result showing some Ha regions too.
#90
Astrophotography / Re: Three darks and one no so ...
Last post by Carole - Sep 19, 2024, 16:09:13I like the re-worked L but not so much the re-worked LRGB, looks a ittle blotchy.