M42 Widefield in [SII], Halpha and [OIII]

click image to enlarge, clock here for highest resolution

[SII] = Red, Halpha = Green, [OIII] = Blue

 

Halpha channel

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Taken on November 19, 2005 from my backyard in Castro Valley, California

AP180EDT f/9 imaging scope used at f/6.75

AP 0.75x Telecompressor

FLI IMG6303E imaging camera @ -26C

AP80/900mm guidescope

SBIG ST7E guide camera

FLI CFW7 color filter wheel

6nm FWHM AstroDon Ha 50mm AR-Coated filter

6nm FWHM AstroDon [SII] 50mm AR-Coated filter

6nm FWHM AstroDon [OIII] 50mm AR-Coated filter

20 exposures of 90 seconds through Ha filter

20 exposures of 90 seconds through [SII] filter

20 exposures of 90 seconds through [OIII] filter

1 hour 30 minutes total exposure time

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