I’m back … Remember me, I’m that scary guy who loves the colour green in astro images – some of you get really upset with my choice of colour palettes. My colour aesthetic is obviously deviant, but hopefully improving. Perhaps someone else in this forum is a weirdo and likes this rendition of the Great Eta Carina Nebula, my most recent attempt at portraying this spectacular object.
The most challenging aspect of imaging with a tiny f/3.6 astrograph is focussing the damn thing manually. The focus sweet spot is tiny for ultra-fast optics. It would be nice if someone manufactured a cheap universal electronic focusser, something I can afford to acquire using my modest salary.
3476 x 3476 pixel version:
https://flic.kr/p/2hLfexf
Technical Details:
Borg 55 mm f/3.6 astrograph, Astrodon 3-nm SII, Ha, and OII filters, QSI 683wsg camera. Mount: EQ8. Two part mosaic imaged from suburban Sydney.
SII: 66x 14 minutes = 15 hours, H alpha: 115 x 14 minutes = 26 hours, OIII: 60 x 11 minutes = 11 hours.
Software: Nebulosity 4, PHD 2, PixInsight, Lightroom and Photoshop.