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NGC7635 H-alpha - Dew Control Test

Technical card

Imaging telescope or lens: Teleskop-Service ONTC 8" f4

Imaging camera: ZWO ASI1600MM-Cool

Mount: Astro-Physics Mach1GTO

Guiding telescope or lens: Finder Guider

Guiding camera: Orion SSAG

Software: PixInsightMaxim DL

Filter: Baader H-alpha 7nm

Accessory: Skywatcher Coma corrector

Resolution: 4552x3360

Dates: Oct. 12, 2016

Frames: Baader H-alpha 7nm : 80x180" (gain: 139.00) -15C bin 1x1

Integration: 4.0 hours

Avg. Moon age: 10.14 days

Avg. Moon phase: 77.70% job: 1280476

RA center: 350.022 degrees

DEC center: 61.223 degrees

Orientation: 177.517 degrees

Field radius: 0.769 degrees


If you image in the Southeast USA then you will have to deal with dew - in my case the primary of my 8 inch f/4 Newtonian would start to dew up about midway through the night! I made some very low heat dew pads to put behind the primary to barely keep it above the dew point. This image was a test to see if this injection of heat would affect image quality. As far as I can tell it isn't. To sharpen the image some more I applied deconvolution as well.




Sky plot

Sky plot


NGC7635 H-alpha - Dew Control Test, mikefulb