I simply wanted to know, how the QHY5III715C planetary camera would function if used for some bright deepsky object. And the M57 Ring nebula is bright, indeed.

I got it, but I am not so really convinced, that it work good.

Today's
Conditions		 : Clear sky, Temp +13°C ~ +16°C, ~70% humidity, very clear, good mediocre seeing, no wind.

M57 Ring Nebula with Planetary Camera experiment
Date - Time : 19 May 2025 - from 2144 UT+
Image Data:
Camera=QHY5III715C | ROI=Full Frame 3864x2192 | Filter=built-in IR Cut | 60 images à 15 sec | Gain=98 | Offset=30
Intes MK67 150/1800mm (no Projection)

Equipment

Optics              : Omegon Pro APO Triplet ED FCD-100 d=85 f=510mm Apochromat (f=1/6)
                    : Intes MK-67 Maksutov Type Reflector d=150mm f=1800mm (f=1/12)
Camera              : Omegon veTec 533 C Colour CMOS Camera with IMX533 square 9MP sensor 3,75µm pixels
                    : QHY 5III715C Colour CMOS IMX715 8,2MP sensor 1,45um pixels high speed
                    : NIKON D7000 DSLR unmodified (from 2011)
                    : The Imaging Source DMK21AU4.AS monochrome USB highspeed camera
                    : Panasonic LUMIX G110 MFT System (from 2021)
Filter              : IR/UV Cut, Astronomik H-Alpha, Astronomik LRGB set + filter drawer
add. optics         : ED 2x Barlow lens, eyepiece projection
                    : 35mm, 50mm, 135mm and 200mm NIKON lenses available
                    : 2.8/60mm Sigma, 12 .. 60mm Leica for MFT system
Mount               : VIXEN GP Highspeed Step Motors (Non Vixen Motors)
Controller          : EQStar Pro (System from Astro Gadget / Ukraine - since May 2023)
Focusing            : EAF (Electronic AutoFocus) Gemini (?China) on APO
Guiding             : PHD2
Aquisition          : DELL Notebooks (Windows 10 & Windows 11), SharpCap, FireCapture and others
Image Processing    : DeepSkyStacker, Siril, Gimp and others

latest list update  : May 2025