www.astrocafe.hk

NGC7000, North America Nebula
Date: 2014 October 19
Location: Hong Kong Astronomical Society - Shui Hau Observatory
Telescope/Lens: Takahashi FSQ106n
Reducer/Barlow: Takahashi 0.7X Reducer
Tracking Mount: Sky-Watcher Italia HEQ5 Pro
CCD/ Camera: SBIG STF8300M
Guiding: StarlightXpress Lodestar mono autoguider 250mm guilding scope
Number of exposures :
Ha 13 x 300s ( 1x1 )
Green 1 x 300s ( 1x1)
Blue 1 x 300s (1x1)
Software: CCDStack, PS, PI

Very nice.

我看Ha曝光可以延長些。　

有沒有FITS未處理時的Histogram看看？