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We increased the power, and at or beyond 101x, he said the reds were somewhat marginal.

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At 101x in a 200 mm diameter the surface brightness of an extended object is 2.7 - 3 magnitudes less than the original. Thus the huygenian region in the scope was shining at about 17 mpsas. The nearby region,s which starts at 17-18, were shining at 20-21 and above. You are saying that *real red* can be seen at 20 and above (depending which was the actual region).

I renew you the question: Do you think there is some limit or not? Which is, according to you, the threshold for L-cones inactivation?

Edited by Mauro Da Lio (12/06/07 05:09 PM)

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