www.astrocafe.hk

Date: 31-July-2010
Time: 02:35
Object: Ring Nebula
Scope: Skywatcher MK127
Camera: Nikon D300s (Liveview focus)
No AutoGuider
ISO: 3200
Shutter speed: 12s
Original size: 4288 x 2848
Single JPG.

很好的嘗試，不如多拍數張疊加反及稍延長曝光時間，例如30x30s，星雲會更顯現的。

昨天跟Willis一起去拍了? 今晚出動否? 我準備好了

我現在要去婚宴，應該來不到．

Yes! I went imaging with Lewis last night. There are lots of mosquitoes. Remember to prepare for it, long sleeves shirt, long pants & mosquito repeller. I may not join tonight...

Date: 31-July-2010
Time: 02:35
Object: Ring Nebula
Scope: Skywatcher MK127
Camera: Nikon D300s (Liveview focus)
No AutoGuider
ISO: 3200
Shutter speed: 12s
Original size: 4288 x 2848
11 JPG (DSS).

This one is less noisy. PS processed?

willis 寫:This one is less noisy. PS processed?

Resizing the original images to 50%.
Using DSS stacked, without changing any parameter.
PS: only croping the central area.

LESS NOISY = maybe the resizing effect of the image(s), because they are being averaging during resizing (MAYBE).