NGC 6888


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

Combined R and scaled down Ha images to make a new R channel.
Combined with G and B channels to form an RGB image.
Used Ha image as an L channel.

Data reduction done with AstroArt 3.0, LRGB processing and final color/histogram adjustments done with Photoshop 7.

Its pretty clear I need to go much deeper with my Ha exposures to reduce the noise. Also alot of bloating of stars, most like because of focus change between filters and as the temperature changes, and because of blue sensitivity of SXV-H9 is beyond where Sky 90 is corrected? I will be trying an IDAS LPS filter which will have a blue cutoff that may help some.

Date: 7/26/2003
Telescope: Tak Sky 90 + field flattener(400mm)
Mount: Vixen GP/DX
Camera: SXV-H9
Exposure: H Alpha: 40 minutes, binned 1x1, RGB: 8:8:12 minutes, binned 2x2