Subject: Re: ATM Long focal length advice required please,

["Bob Walker" <tac@i1.net>]

Dismangling (I meant dismantling, but I'll let that typo stand!) a copier
yielded a squirrel cage blower nearly a foot long and only 2.5" in diameter.
That would provide a uniform, nearly laminar airflow across the entire face
of a good-sized mirror.  No swirling.  Seems to run fairly slowly and
quietly, but I haven't tried it bolted onto a scope yet.   The main saving
grace of copiers is that though the yield of usable parts per pound may be
low, they can often be had for the asking.

 *  Best regards, Bob
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