Re: [APML] Novak cells, clip diffraction patterns (was Alnitak)

["Bobby Middleton" <bobm@koyote.com>]

Whatever is the cause in the Vixen scope, the same effect is present in most
of Malin's photographs with the AAT. Check out his pics in his book or his
site.
Bobby Middleton

From: Torsten Clay <tclay@theriver.com>

> I have mirror clips on my 8" F/5 similar to Bobby's description. The
> mirror is actually glued in, but I leave the clips on for safety. I don't
> see effects like those from the Vixen either.
>
> Are the mirror clips in the Vixen painted flat black? Maybe something else
> in the tube (part of the spider?) or a reflection in the coma corrector is
> causing it.
>
> Torsten Clay
>
> > Michael, the cell is a Novak and the mirror is held in there pretty much
> > like my mirror on my other newt. It has 3 "clips" which hang over the
mirror
> > face maybe 1/8 inch. The mirror floats on a 9-point cell. I don't get
those
> > clip diffraction patterns on either of my newts and they both have Novak
> > cells. Is that 2 sample poll enough to establish a pattern? Any other
Novak
> > cell users out there have a word?
> > The mirror will "guess" out at about 10 lbs, but that's just a guess.
>
>
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