Rho Ophiuchi cloud complex

Date: 02.09.2013 and 03.09.2013
Ambient conditions: 22°C
Location: Crisopolis, Brazil

Telescope: FSQ-106EDX f/3.6
Mount: ASA DDM60
Camera: SXVF-H36
Guiding: No guiding
Filters: LRGB Astronomik

Software: Maxim DL 5
FOV, Image scale: 327 x 219 arcmin, 4.0 arcs/pixel
Sub-exposures: L 80min 1x1 / R 30min 2x2 / G 60min 2x2 / B 20min 2x2 (10 min light frames)
Calibration: Flats and Darks 

CCDStack: Calibration, registering, Mean stacking
ExCalibrator: RGB factors
CS5: LRGB composite, Curves, Levels, Color adjustments

Many difficults with this object: a) lights taken at variable weather conditions, so only a few frames could be used; b) spacer for Tak reducer was wrong, so oval stars at the corners can be seen; c) object very low on horizon and d) gradients created by street illumination on some color images.

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