New workflow focused about IC1805 with narrowband and RGB data addiction.
AFter PixInSight normal workflow, parallel for SHO, HOO and RGB integration, I reached the point of star separation from nebuloisty. Starless SHO and HOO files was developed with color masks and curves transofrmation in PixInSight, thus finally cleaned and polished by NoiseXTerminator and BlurXTerminator.
SHO, starless and stars
HOO palette, starless and stars
RGB stars master was simply saved as .tiff.
SHO starless after adjustements and pixel fixing
Starless and stars composition made in Photoshop, after dedicated adjustements, with screen stars layer blending over starless SHO nebula.
LDN1355 Helping Hand Nebula in LRGB, 600 sec. subframes at -25C by Takahashi FSQ-106ED with CCD Proline FLI PL16083, from Spanish IC Astronomy Observatory, Telescopelive network.
After cosmetic correction of calibrated subframes I realized 2 LRGB integration by PixInSight: the first one by Process > ColorSpaces > LRGB combination, and the second, after integrating RGB masters, by Script > Utilities > LinLRGB operating over L master and RGB just created one.
I thus proceed with a normal post production workflow for each integration: LRGB, LinLRGB, RGB and L master: bg removal, platesolving, Spectrophotometric color calibration, Starmask, Deconvolution manual made, with Bg-mask and PSF obtained by EZdeconvolution, first denoising by EZdenoise, Stretching, 1st Dark Structure Enhancing, Starless and Stars version for each one, 2nd Dark Structures Enhancing just to starless, Color Masking and curves transformation (starless), final denosing and sharpening by NoiseXTerminator and BlurXTerminator (still just starless), .TIFF saving.
I finally rebuilt stars + starless image in Photoshop, applying adjustements to starless and star as separated layers group, melted in Lighten blending mode.
As I wasn’t satisfied nor by LRGB,
neither by LinLRGB results,
expecially because of Luminance and contrast, I thus move for another Photoshop workflow, with RGB starless and RGB stars, respectively associated to L starless and L stars luminance layer group, in luminosity blending mode, with dedicated adjustements and opacities setting.
I found this final postproduction better ther previous results, and thus move to a crop version to better focusing about LDN1355.
Region of SH2-157 and NGC7635 in narrowband filters, SHO palette. From Bortle 6th degree sky in Livorno, Italy – home balcony. William Optics Redcat 51 and ASI1600mm Pro cooled at -20 Celsius. Mount SW EQM35 Pro, setup ground on Asiair Pro.
A mosaic composition of IC1805 and IC1848 in SHO palette
Strumentazione Telescopi O Obiettivi Di Acquisizione William Optics RedCat 51 Petzval APO Camere Di Acquisizione ZWO ASI 1600MM-Cool Pro Montature Skywatcher EQ35M Filtri astronomic Oiii 6nm · Astronomic SII 6nm 1.25 · Astronomic 1,25″ Luminance · Astronomik H alpha 12 nm 2 inch Astronomik Accessori ZWO 8x 1.25″ Filter Wheel (EFW) Software ZWO ASIair Pro · Pleiades Astrophoto PinInsight · Lightroom · Photoshop · Astroberry Telescopi O Obiettivi Di Guida QHYCCD QHY Mini Guide Scope Camere Di Guida ZWO ASI120MM Mini
Telescopi O Obiettivi Di Acquisizione William Optics RedCat 51 Petzval APO Camere Di Acquisizione ZWO ASI 1600MM-Cool Pro Montature Skywatcher EQ35M Filtri astronomic Oiii 6nm · Astronomic SII 6nm 1.25 · Astronomic 1,25″ Luminance · Astronomik H alpha 12 nm 2 inch Astronomik Accessori ZWO 8x 1.25″ Filter Wheel (EFW) Software ZWO ASIair Pro · Pleiades Astrophoto PinInsight · Lightroom · Photoshop · Astroberry Telescopi O Obiettivi Di Guida QHYCCD QHY Mini Guide Scope Camere Di Guida ZWO ASI120MM Mini
Dettagli d’acquisizione Date: 28 Ottobre 2021 · 01 Novembre 2021 Pose: Astronomic SII 6nm 1.25: 153×180″ (7h 39′) (gain: 139.00) -20°C bin 1×1 Astronomik H alpha 12 nm 2 inch Astronomik: 170×180″ (8h 30′) (gain: 139.00) -20°C bin 1×1 astronomic Oiii 6nm: 298×180″ (14h 54′) (gain: 139.00) -20°C bin 1×1 Integrazione: 31h 3′ Dark: 33 Flat: 33 Dark dei flat: 33 Giorno lunare medio: 23.80 giorni Fase lunare media: 34.21% Scala del Cielo Scuro Bortle: 6.00 Dettagli astrometrici di base Astrometry.net job: None