My 2022 take of M13.
Slight update to entry to June 2022 Goofi Challenge on CloudyNights:
https://www.cloudynights.com/topic/826262-goofis-imaging-challenge-june-2022-m13-hercules-globular-cluster/page-3#entry11988433Improved from last year's on the RC8, now with EdgeHD 8 reduced. Last year:
https://astrob.in/ufukc9/0/Surprised by the chromatic aberration, presumably from the reducer, which is reported to have this issue but I've not seen it so bad in months of use.
Went RGB only, as L didn't seem to add any value. I have some challenging tracking and some tilt that affects overall sharpness. I don't like a fully muted core since I prefer a more "natural" look, so left the core brighter than many people do. 1hr x 60sec each on RGB. Unity gain. 0C.
EdgeHD 8, 0.7x reducer (1422mm equivalent), Moonlite focuser, Celestron OAG, ASI174MM mini, ZWO EFW, Astronomik Deep-Sky RGB (and L2), ASI294MM bin 2x2.
PixInsight - WBPP, Dynamic Crop, NoiseXTerminator (gentle), RGB combine, ArcsinhStretch, Starnet2 to mute the background blotching, Curves for contrast and saturation. Final polishing in Adobe Lightroom.
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