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Re: How does the AstraIIIb split mirror work?
From: Jim Thompson
Date: 2004 Apr 25, 06:23 -0300
From: Jim Thompson
Date: 2004 Apr 25, 06:23 -0300
> -----Original Message----- > From: Ken Muldrew > > From: Jim Thompson: > > I repeated the experiment, this time blocking the horizon mirror's > > clear window from the front. Not surprisingly I guess, for all 3 > > sighting devices (sight tube, 4.5x30 and 6x40 telescopes) I only saw > > the index mirror's image in the right half of the field of view, and > > it stopped sharply at the center of the field of view where the > > vertical edge of the mirror ended. > > This is surprising. When I block my horizon mirror's clear window from > the front (leaving the mirrored half unblocked), I see the index mirror's > image across the entire field of view with a 5x36 scope. > > Ken Muldrew. By "front" I meant the side toward me, toward the telescope, not the side away from me, toward the horizon. Were we talking about the same "front"? Jim
