To: atm{at}shore.net
From: "Matthew L. Brown" 
Reply-To: "Matthew L. Brown" 



>Sounds way too thick to me.  I made mine out of lumber straps (taken from
>the trash at a large hardware store), and these are 0.015 inch thick.

Diffraction effects are a complex thing.  However, generally, thicker vanes
means bigger diffraction effects.  Curved spiders just spread the effects
out so you don't notice them.


=Matt




>("atm{at}shore.net")
>
>    Hello all again,
>
>             I have made my own spider out of extruded aluminum
1"x 1/16"
> thick. My question to the list
>is if my spider veins are not at  90 degree angles does this cause an
>image problem. My anchoring
>position is more like a squashed X.    I have seen curved spiders, but I
>don't see how any tension
>can be applied. I have heard that the diffraction spikes are eliminated by
>the curved supports.
>         Am I clogging areas by squashing my supports.. Here are the
> dimensions
>   Diameter of cage.... (9.5")
>  The "X" is squashed to 4.5" between supports on each
side leaving  about
> 11" (on the diameter
>measurement) on the opposite gap..something like this........
>
>                                                              *
>    *
>                                                                 *
>*
>                                                                     *    *
>                                                                        *
>                                                                     *     *
>                                                                 *
>   *
>                                                              *
>      *
>
>                          Russ Jocoy
>("atm{at}shore.net")
>                                                                 *
>
>

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