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Thanks Steve,
Dew reduction was also a consideration as the fan will be forced to move air past the mirror which I guess will help too.
Ken,
That was another thing that I saw when I was researching the idea. Some of the truss style newts had obviously open front ends but still didn’t have open rear cells. Obviously an open truss would be useless in a highly light polluted area without at least a cloth cover but I’d imagine that there should theoretically be some benifit in reducing the potential light hitting the glass of the primary. Probably not a huge difference but I’d imagine it would be much like people covering the view finder in their DSLRs.
Cheers
Ryan
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