Re: ATM 3 or 4 vane Spider

[Scott Berfield <berfield@pacbell.net>]

I use a 3 vane spider which I went to because I like the fainter spikes and
I like the aesthetics of the six spikes in my CCD images. Neither 4 nor 6
ever really disturbed me for visual use, though.
-sb

At 12:03 AM 1/9/99 -0500, Art Russell wrote:
>
>I'm contemplating ordering either a 3 or 4 vane spider for a 6 inch, F4
>Newtonian for which I'm currently polishing the mirror.
>
>Any comments about the current thinking about the best way to minimize
>difraction spikes? 4 vanes seem to be self reinforcing whereas 3 spikes seem
>to create phantom spikes. If anything else new is noted in the FAQ, I've
>missed it.
>
>Thanks and Cheers!
>
>Art Russell
>
>Atlanta, Georgia
>
>mailto:artrussell@mindspring.com
>http://Education.gsu.edu/spehar/
>
>What are the facts? Again and again and again - what are the facts? Shun
>wishful thinking, ignore divine revelation, forget what "the stars
>foretell," avoid opinion, care not what the neighbors think, never mind the
>unguessable "verdict of history" - what are the facts, and to how many
>decimal places? You pilot always into an unknowable future; facts are your
>single clue. Get the facts!
>
>- Robert A. Heinlein, from "The Notebooks of Lazarus Long"
> 
Scott Berfield, Computer and Video Game Production and Design
http://www.berfield.com
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