NGC 3576 in Narrowband SHO, taken from my backyard in Auckland, New Zealand. This is my second narrowband image.

Acquisition Details:

Scope: GSO 8" F/4, flocked, DIY AutoFocuser, DIY Secondary Dew Heater Coma Corrector: SkyWatcher Aplanatic/Quattro Camera: ZWO ASI 1600MMC PRO (Image scale ~1"/pixel) Mount: EQ6-R Guide Scope: ZWO 60mm Guide Cam: QHY5LIIC 30x300s Ha (ZWO 7nm) 26x300s OIII (ZWO 7nm) 16x300s SII (ZWO 7nm) Roughly 6 hr total integration. All at unity gain, 21 offset, -15 degrees celsius. Acquired with the NINA imaging suite. Guided with PHD2. Mount interface: EQMOD

Processing Details:

Flat & Dark Calibration SFS/Registration/integration TGV and MMT NR on all 3 stacks HT on all 3 to roughly same levels Linear fitted to Ha RGB Combination (SHO) SCNR, invert, SCNR Hue Curves, green curve (make bg less green), small contrast curve HDRMT Star Reduction AdvSharpening LHE with range mask Saturation boost and careful contrast curves (may have gone too far at this point)
Date Created: 2019-03-30
Date Posted: 2019-05-06