Re: [APML] Collimation of Vixen/Orion R200SS question

[Axel Mellinger <axm2@canopus.physik.uni-potsdam.de>]

On Fri, 17 Aug 2001, Robert Gorichanaz wrote:

> This is an email I sent to Herm Perez yesterday.  I'd appreciate the
> assistance of anyone else on the list who happens to have this scope (or
> similar).

> On the rear of the scope are three recessed allen-head screws, and three
> "star head" screws.  Which one(s) are the collimation screws?  I tried
> turning the recessed allen-head screws, but that really didn't do very much
> (all three are tight, and loosening them didnt seem to do anything).  The
> "star head" bolts (rounded head w/washer) don't seem to do anything either.

The screws work in pairs, i.e., when you loosen the recessed screw, you
need to tighten the adjacent round head screw (and vice versa).

> I figured I'd ask you, since I know you have the same scope, before I go
> ruining things - I have this horrible mental image of the mirror falling
> from the scope and shattering on the ground.

You'd notice the round head screws falling out from the back first. If you
don't loosen all 3 of them simultaeously, your mirror should be safe.

Regards,

Axel

-- 
Axel Mellinger  <http://canopus.physik.uni-potsdam.de/~axm/astrophot.html>



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