Well I certainly appreciated the thread, found very informative.
Rich Girard
On Aug 27, 2008, at 8:17 PM, Mark Johnston <mark@No-Spam>
wrote:
> 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
---
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 20:42:26 2008
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