A super widefield astrophoto I took in a bright & short moonless July night (2021). This is just 12 mins of unguided data! I used a reduced FSQ85-ED and a D180A. Can you spot the bright supernova Nova Cas 2021 below the star cluster M52? It was really bright that night and I couldn't resist and after the short imaging session I bought out my 100mm fluorite refractor and my widest 40mm eyepiece to observe it. The seeing was phenomenal that night.
As summer nights, here in UK, are bright and short my FSQ-85ED was equipped with its dedicated reducer making it a f/3.8 astrograph. No guiding was used as the encoders of the CEM25EC mount can handle the 3 mins exposures I used perfectly fine.
Initial post processing
Further post processing
16th July 2021, Warwickshire, GMT+0, United Kingdom, TEMP: 20C, Bortle Class 4 ~SGM: 21.20 mag./arc sec2
Camera: Nikon D810A
Imaging Telescope: Takahashi FSQ-85ED
Correcting Lens: Takahashi Reducer-QE 0.73x (composite focal length at 328mm and focal ratio at f/3.8)
Mount: iOptron CEM25EC
14 bit RAW (NEF)
ISO 1250, 4 x 180" subs
16 Darks, 16 Bias, 24 Flats