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Old 07-10-2011, 12:55 PM
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madbadgalaxyman (Robert)
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madbadgalaxyman is offline
Join Date: Mar 2011
Location: Brisbane
Posts: 915
Nice modification there, and undoubtedly it puts the unwanted light somewhere away from your eye! Anything that increases the image light and decreases other light reaching the eye is a wonderful thing. (for instance, I am all for getting the the highest reflectivity mirror coatings that I can afford)

I have heard it said by experienced observers and telescope makers that the apparent contrast advantage of traditional (F10 to F15) refractors over newtonian reflectors is simply caused by the traditional refractors having longer tubes and tubes which are well baffled....leading to there being actually less light all over the observed field, and thereby explaining the slight edge that these long-tube refractors had for visual observation of deep sky objects.

cheers, Robert
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