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M42 taken on 10th Feb 09 with Williams Optics 80mm, .8 focal reducer and Canon EOS450. Various exps stacked in DSStacker and Pshop6. David

M42 taken on 10th Feb 09 with Williams Optics 80mm, .8 focal reducer and Canon EOS450. Various exps stacked in DSStacker and Pshop6. David

From: Wycombe Astronomical Society Members (Thu 12 Feb 2009 02:34:50 PM CST)
That's good David, you are getting more red in the nebula than I can manage, you haven't removed the IR filter have you?
Which focal reducer are you using?
Chris
From: Wycombe Astronomical Society Members (Thu 12 Feb 2009 03:44:41 PM CST)
Hi Chris. I used the WO 0.8 focal reducer, designed for the 66mm 'scope but works ok with the 80mm. Lots of exposures ranging from 45" 1600 to 4" at 400 ISA, Final image was quite low noise so I could increase saturation and contrast to make up for L Pol and low red sensitivity.

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