Posted 08 December 2012 - 10:21 AM
Great pictures Darren, very interesting to see underneath the hood, so to speak!
Lovely to see the pic showing it with the original ad.
Posted 08 December 2012 - 11:07 AM
Posted 09 December 2012 - 09:53 PM
Posted 09 December 2012 - 10:20 PM
Posted 10 December 2012 - 10:00 AM
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Posted 10 December 2012 - 02:41 PM
Posted 10 December 2012 - 04:46 PM
Question: Does anyone know why both sides of the meniscus are coated in the center with a relfective coating? Is this typical of maks???
I believe a clarification is in order. Both sides of a Questar's meniscus are coated with magnesium fluoride or multi-coated with a combination of other substances to reduce unwanted reflections off the surfaces of the glass and thus enhance light transmission through most of the meniscus. In addition, a relatively small area at the center of one surface of the meniscus is also coated with aluminum or silver to create a mirrored spot (the secondary). On earlier Questars, like the cutaway model, the secondary mirror was located on the outer surface of the meniscus. On later Questars, it's deposited on the inner surface of the meniscus, and an opaque plastic disk is the centered on the outer surface. The mirrored spot, whether on the inside or outside surface of the meniscus, forms what is also known as the central obstruction.
Posted 10 December 2012 - 08:36 PM
Posted 29 December 2012 - 12:53 PM
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Posted 13 November 2013 - 02:06 PM
Posted 14 November 2013 - 09:06 AM
Posted 14 November 2013 - 12:09 PM
This should've been in Willy Wonka's office
Posted 14 November 2013 - 04:19 PM