Re: ATM 3-Vane or 4-Vane Spiders

["Nils Olof Carlin" <nilsolof.carlin@telia.com>]

> As best I recall, one of the reasons he
> likes using wood is so as to minimize thermal effects.  It does seem like
> the extra thickness is a down side to using wood, though. 
> -- Andrew Bell

Did he suggest a reason why wood would minimize thermal effects? Common sense says it would, but....<G>

I admittedly only vaguely recall seeing some photos of how he glued shingles to a center piece of wood, but I can't recall any means whatsoever of adjusting the secondary for collimation. This must be done - anyone knows how??

NOC