2014年第一次開POST~~ 北美洲星雲 (NGC 7000) 和鄰近的鵜鶘星雲(IC 5070) Camera:Canon 450D (mod) Lens: EF200 f2.8L/@f2.8 ISO: 1600, 800 Exposure time: Ha: 240 sec x 54, RGB: 180 sec x 60 Mount: HL-1 Filter: Astronomik H-alpha 12nm filter & Astronomik CLS-CCD filter was used Dark, bias applied Software: DSS, PS, PI https:...