M57+Maxim Sphinx VMC200+FR 100*10s + 77*20s
Unguided Dark SUM Balance Stretch Unsharp

18-Jul-07
M57/NGC6720
Planetary Nebula

Mount Maker/Type Vixen/Sphinx
OTA Maker/Type Vixen/VMC200L
F(mm)/D(mm) 1950*0.63/200 = 6.1
Amplification (Barlow/FR) Focal Reducer
Coma corrector No
Filter: No

Maker/Type Orion/StarShootDSCI
Ship size [mm] 4.89×3.64
Pixel array 752×582
Pixel size [µm] 6.5×6.25
Resulting FOV [ArcMin] 18.8×14.8

Auto-guiding No
Exp Qty > 100*10s + 77*20s

Dark
No Flat
Gain 63
Offset 100

Maxim essential
Dark
SUM
Balance
Stretch
Unsharp