M101 (Ha+R)GB and RGB from IMG6303 and AP180EDT

With Halpha enhanced HII regions (Ha+R)GB

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RGB only

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Taken on May 27, 2005 (RGB data) from Fremont Peak State Park near San Juan Bautista, Ca.  and March 25, 2005 (Ha data) from my backyard in Castro Valley, Ca. 

AP180EDT f/9 imaging scope used at f/6.75

AP 0.75x Telecompressor

FLI IMG6303E imaging camera @ -35C

AP80/900mm guidescope

SBIG ST7E guide camera

FLI CFW7 color filter wheel

Optec IR-Blocking 50mm RGB filters

6nm FWHM AstroDon Ha 50mm filter

3 exposures of 20 minutes through Red, Green and Blue filters

3 hours total exposure time (RGB)

9 exposures of 20 minutes through 6nm AstroDon Halpha filter (3 hours total)

6 hours total exposure for Halpha+RGB image

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