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IC1805 Heart and IC1795 Fish Head

Posted: Fri Dec 05, 2025 4:31 pm
by nexusjeep
So second outing with the new wider field scope as previously could never get IC1805 and IC1795 in the one shot so with the new Gear70Q I can. The image is 136 x 3 min subs there would have been a few more but for some reason Green Swamp Server kept crashing, and I had to reset the mount three times oh the joys persuading multiple pieces of software to get on with each other.

The image was integrated and processed through PixInsight using masterdrark, masterbias, 100 flats, master flat dark, 136 x 3min lights
Sequence was :-
WBPP
Automatic DBE
BlurXterminator
SpectrophotometricFluxCalibration
SpectrophotometricColorCalibration
StarXterminator
Split RGB to R G B Grey scale separates for nebula.
Create Ha, Combine Green + Blue to make OIII with Pixelmath
GeneralisedHyberbolicStretch to Ha OIII
Generate HO Green Channel with Pixelmath from Ha OIII
RGB Combine
NoiseXterminator
CurvesTransformation
Save Nebula + stars as separate Tiff's
Combine image in Affinity Photo (original V2 as not tried the new one that has been released for free)

Image25.12.04 IC1805 and IC1795 by Nick Davis, on Flickr

Also considering reactivating my Astrobin account so I can share the images at full size if anyone wants to pixel peep or just see the images at a larger scale than flickers free option, it would also give me a backup location for the full size .xsif file from Pixinsight

Kit used
Imaging kit : Starfield Gear70Q 70/350 Petzval, ZWO EAF + CAA, ASI2600MC-Pro + Antlia Quad Filter
Mount : M-UNO Synscan
Guide : APM-LZOS 130/780 + 0.75x MR flattener/Reducer, + Esatto 4" Focuser, Altair 290M guide camera
Software: SharpCap, GSS Mount control software, PHD2, Stellarium, PixInsight, Affinity.

Thanks for Looking

Cheers
Nick