[avandonk]

Finally got a clear night after three months. Tried out the new observatory and the fridge temperature controller. The temperature in the fridge stayed at -10.0C all night. So I did not use ICNR. With constant temperature the darks exactly match the lights.
Details Canon 5DH, 150mm f/4.5 Achro, Astronomik 13nm HA filter, 12x16 minutes at 800 ISO. Flats and darks with ImagesPlus, Stacked with Registar and finished in PS.
Below is a full frame and a 100% crop. I am doing a HDR composite of HA and O3 and full colour to get star colours so more nights needed.

It was a real pleasure to shut the roof and just go inside at dawn.

Bert