Ngc 6888 - Crescent Nebula In Hargb + O3

Telescope: APM Astrograph 107, f/6.5 with Baader Steeltrack Focuser and 2.5'' TS FF

Mount: NEQ6 Pro with EQ Mod and XBOX Wireless Controller

Camera: ATIK 314L+

Image Scale: 1.91 arcsec/pixel

Filter: Baader Ha 7nm, IDAS LPS

Filter Wheel: Starlight Xpress Motor USB, 7x1.25''

Guide Camera: QHY5 with PHD Guiding and TS UV/IR Block

Guide Scope: Skywatcher Finderscope 8x50

Exp. Time: 5 hours & 12 mins (Ha: 150 mins, O3: 72 mins, R,G,B: 30,30,30 mins)

Temperature: Ambient (8C..14C), CCD (-5..-10C)

Capture: Nebulosity 2.3.0

Register, Stack: Maxim DL, CCD Stack

Processing: Photoshop CS3

Date: 13 May 2011 (Ag. Panteleiomon, Attica, GR) & 29 July 2011 (Parnon Mount, Arcadia, GR)

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