NGC 7023


(Click to enlarge)
This image © Copyright 2018, Michael Fulbright

This object is also known as the Iris Nebula. Tried the IDAS LPS light pollution filter out for this shot. Seems to have tamed some mild gradients I would usually get imaging in this part of the sky. However it reduced my counts by about 60 percent. With the tools available today I can normally remove any gradients via software so I'll probably leave the LPS filter off for now.

Date: 9/03/2005
Telescope: TEC 140 APO + 0.75 Astro-Physics focal reducer (750mm) + IDAS LPS filter
Mount: MI-250
Camera: SXV-H9
Exposure: L: 84 minutes (28x3 minutes) unbinned; R: 36 minutes (12x3 minutes) G: 24 minutes (8x3 minutes) B: 30 minutes (10x3 minutes) binned 2x2