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Old 05-03-2021, 12:37 PM
Startrek (Martin)
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Startrek is offline
 
Join Date: Dec 2017
Location: Sydney and South Coast NSW
Posts: 6,666
8” f5 Newt Coma Star Test using Baader Mk3 CC

Although clear, conditions last night on the South Coast were poor but I wanted to test my Baader Mk3 coma corrector spacing on the 8” f5 newt
I had already proven my 6” f6 scope in Sydney earlier in the week with a spacing of 56mm sensor to coma corrector, coma free to edges
Picked a dense Star field near the Statue of Liberty Nebula and captured 8 x 5 minute dithered guided subs using the 56mm spacing
ZWOASI2600MC
PHD2 Guiding around 0.90 arc sec error
Processed this morning and coma is virtually eliminated from the corners
Pretty happy with a successful outcome with both scopes using the Baader Mk3 Coma corrector

Here’s some images
Original version ( ignore the halo around the star , due to conditions)
Cropped versions in each corner

Thanks for looking
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