i agree with Joe
another way to get the same thing is to take Scope focal length *
1/Magnification
Magnification = fl of scope/fl of eyepiece
Focal ratio = focal length of scope / aperture diameter
simple algebraic manipulation will give the result Joe cited
rdc
----- Original Message -----
From: "Joe Huber" <joe@huberfamily.org>
To: "'The Astronomy Connection'" <sf-bay-tac@seds.org>
Sent: Tuesday, July 27, 2004 1:43 PM
Subject: RE: [TAC] Exit Pupil size?
> I believe the calculation is the eyepieces focal length / F ratio of the
> scope.
>
> -----Original Message-----
> From: sf-bay-tac-bounces@seds.org [mailto:sf-bay-tac-bounces@seds.org] On
> Behalf Of LeFevre, Paul
> Sent: Tuesday, July 27, 2004 1:36 PM
> To: The Astronomy Connection
> Subject: RE: [TAC] Exit Pupil size?
>
>
> Mark,
> I got one with my TeleVue Radian eyepiece...don't know if Al still puts
'em
> in there, but if you've got a Radian box around, open it up and see :)
>
> Paul
>
>
> -----Original Message-----
> From: sf-bay-tac-bounces@seds.org [mailto:sf-bay-tac-bounces@seds.org]On
> Behalf Of Mark Wagner
> Sent: Tuesday, July 27, 2004 1:32 PM
> To: tac
> Subject: [TAC] Exit Pupil size?
>
>
>
> Is there such thing as a pupilometer, so I can measure the size of my exit
> pupil?
>
> Thanks....
>
> Mark
>
>
>
>
>
>
Received on Tue Jul 27 13:48:58 2004