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Everything posted by Laurin Dave
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Very nice Olly, the Blues look slightly Green/Teal on my screen maybe reduce the yellow in Blue and Cyan? I eagerly await your full Samyang 135 Hi Res enhanced Rho Ophiuchi Blue Horsehead mosaic. ... Also found out on a recent trip to see some friends in Northumberland that I know your old college friend Keith... Small world! Dave
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Out of adversity... the Blue Horsehead Nebula, IC4592
Laurin Dave replied to Fegato's topic in Imaging - Deep Sky
Marvellous image, and very nicely processed. You must have a very good southern horizon Dave -
The Dusty Pleaides - Esprit100 GT71 Askar200
Laurin Dave replied to Laurin Dave's topic in Imaging - Deep Sky
Thanks Olly Thanks barbulo Thanks MIke Thank you -
The Dusty Pleiades, another combination of data from multiple sources:- Esprit100SX46 5.5 hrs Lum, 6hrs RGB, GT71 ASI1600mm 6hrs RGB, Askar200ASI1600mm 4hrs RGB and Askar200ASI2600mc 4hrs RGB. Processed in Pixinsight and Photoshop using the NSG script to combine all the colour data. Blur, Star and Noise Exterminators also used with great effect. Stars are from the Esprit100SX46 RGB data. Somewhat pleased with the result as with the combination of all that colour data (20hrs) I've finally managed to get some colour in the dust! Thanks for looking Dave
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Imaging with the Samyang 135mm f2
Laurin Dave replied to Uranium235's topic in Getting Started With Imaging
Thanks Olly.. Dust colour courtesy of balancing the red and green in the Histogram rather than removing the green with scnr, then boosted with the LAB colour Soft light method you showed me Thanks Steve -
Imaging with the Samyang 135mm f2
Laurin Dave replied to Uranium235's topic in Getting Started With Imaging
4 hours on the Pleiades from November 2022, Samyang135 at f2.8 and ASI2600mc, gain zero minus10 300second subs. Processed in Pixinsight :- calibration, cosmetic correction, debayer, reg, NSG, integration, DBE, Spectrophotometric colour calibration, BlurExterminator, StarExterminator, NoiseExterminator and stretching (ArcSinh, HT and GHS)) and Photoshop for colour enhancement, combining various levels of stretch and adding the stars back using Screen mode, Thanks for looking Dave -
Very nicely processed image of a difficult target. Well done Dave
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Very nice Olly, lovely to see the colours of Orion in pure RGB. Oh for dark skies. I hope to extend and deepen my HaRGB version to match your FOV next time Orion comes around. Dave
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Congratulations and well done.. great image Dave
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Altair 26C dark frame settings
Laurin Dave replied to Priesters's topic in Imaging - Tips, Tricks and Techniques
I use a stack of 25 20 min darks taken at low gain .. although this doesn’t matter as gain doesn’t change which pixels are bad.. I calibrate with Pixinsight and use the master dark in the Cosmetic Correction process with hot pixel rejection sigma set at 3.. Pixinsight then uses this to create the Bad Pixel map with which to correct the lights.. which it does very quickly.. HTH Dave -
The Ghost and the Iris - 6 scopes and now 11.5 years!
Laurin Dave replied to Laurin Dave's topic in Imaging - Deep Sky
Thank you Goran, much appreciated Dave -
The Ghost and the Iris - 6 scopes and now 11.5 years!
Laurin Dave replied to Laurin Dave's topic in Imaging - Deep Sky
Thanks you Jason Thanks Olly, much appreciated... the Iris benefitted from Pixinsight's LHE and HDRM, with HDRM bringing out those shafts of dust. Layered together and merged in Photoshop of course . I've also realised at last that too early application of SCNR or HLVG destroys the browns in dust. Dave Thank you -
A reprocess of all the above data using Russ Croman's game changing BXT, SXT and NXT tools, Pixinsight and Photoshop. Smaller more colourful stars, brown and more dust, more detail in the Iris.. Wide field and close up of the Iris. Thanks for looking Dave
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Altair 26C dark frame settings
Laurin Dave replied to Priesters's topic in Imaging - Tips, Tricks and Techniques
I have ZWO and QHY cameras with the same sensor and use matching Bias only for Flats and Bias plus Bad Pixel map (from a long Dark) for Lights. It works fine and saves a lot of effort. The Dark current with these sensors is next to nothing as you can confirm when you get it. Dave -
M63 revisited with modern software...
Laurin Dave replied to ollypenrice's topic in Imaging - Deep Sky
Fabulous image Olly, what a difference these new tools make, not only do they improve the result I find they also save a bundle of time... Just as well as I now need to re-process all my data! I love the tiny, halo free stars with better colour and background galaxies seemingly popping out of nowhere. The edge on spiral in this image really stands out behind M63, sharper and deeper colour than your previous process. My Ha data on galaxies seems to particularly benefit from the BXT,SXT, NXT treatment Dave -
Its good at APSC size and pretty good at full frame when pointing high in the sky (wobbly focuser). The original one purchased in 2020 had very poor corner stars even with an ASI1600 and was diagnosed as suffering from the objective pointing off centre with respect to the reducer. It was replaced by FLO.
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Indeed I do.. focuser could be better though in terms of flex
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Thank you Allan.. Thanks Steve.. much appreciated.. I've just about recovered now after a long lie down Dave
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Thank you Alan... Dave
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Thank you Olly, much appreciated. Looking forward to seeing your version, hopefully not too long a wait. Dave
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I gathered some Ha over top right the last two nights to enhance Barnard's Loop (and obscure the noisy stuff underneath ) ... here it is Dave
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As @scotty38 says to start with you need to adjust the flattener to 9.1mm. I found with mine that in-order to fine tune the flattener spacing (from 9.1) I needed to remove the rotator to get some extra back focus. Once I'd got the spacing correct I put the rotator back and all was fine. Hopefully be the same with yours
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LBN 559 to LBN 564 - a ghost chasing a pig in space
Laurin Dave replied to gorann's topic in Imaging - Deep Sky
Very nice Goran... Pigs in Space eh... sorry couldn't resist