Ok, public confession here: I had actually meant to send the original
question off line but forgot to cut-paste in the address.
But what a great slew of replies! (online and off)
Thanks to all of you guys, and enjoy these great observing days we are
having
(oh no, I may have just jinxed it, rain on Sat now ... )
Mark
Greg Claytor wrote:
> --------------------------------------------------
> From: "Robert Ayers" <astroayers@No-Spam>
> Subject: Re: [TAC] 58mm Plossl question and measuring pupils
>
>> So, you cut a long piece of paper into a wedge, say 3mm wide at one
>> end and 12mm wide at the other. Do the above experiment, after you
>> are adapted, and find the spot along the wedge that just blocks the
>> object.
>> Measure the wedge at that point and you have your pupil diameter.
>
> ~ how distant and large should the point source be? and, is pupil
> diameter the same as the exit pupil? Tryin' to keep up.
>
> ---
>
> Aug 25, 2008: TAC Web Page Updated
> http://observers.org/TAC.cgi/Announcements/
> CalStar - Sept 25-27, BYO Party! http://www.sjaa.net/calstar/
> TAC mailing list - join or leave here:
> http://seds.org/mailman/listinfo/sf-bay-tac
>
>
>
---
Aug 25, 2008: TAC Web Page Updated http://observers.org/TAC.cgi/Announcements/
CalStar - Sept 25-27, BYO Party! http://www.sjaa.net/calstar/
TAC mailing list - join or leave here: http://seds.org/mailman/listinfo/sf-bay-tac
Received on Wed Aug 27 20:17:35 2008
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