NGC7023, the Iris Nebula, in the constellation Cepheus.
Imaged with Meade DSI Pro II, Meade LRGB filters on Atik Manual Filter Wheel,
through Celestron 80mm C80ED refractor, focal reduced to 300mm focal length f/3.8.
Hutech IDAS LPS filter used on all channels. Mounted piggyback on 8" LX90, guided by DSI Pro.

L: 42 x 4 minutes
R: 8 x 4 minutes
G: 11 x 4 minutes
B: 17 x 4 minutes

5 hours, 12 minutes total exposure. Straight LRGB processing, using 2X up-sampling prior to subframe alignment. Noise reduction using Noiseware Pro, layer masked into low-signal areas.