Archived posting to the Leica Users Group, 2000/11/06

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Subject: Re: [Leica] Leica lens turned into a telescope - can it be done?
From: Jean Marc Becker <jean-marc.becker@wanadoo.fr>
Date: Mon, 06 Nov 2000 19:27:05 +0100
References: <011c01c047e1$f46c3600$4d02a8c0@neurosoft.lan>
 
> Saturn is some 20 arcseconds wide. You will need 500 lpm to even
> see more than light point. To see rings I suppose you will need
> some 5000 lpm :-)

40 arcseconds for the rings. It needs an objective aperture of at least
100 mm to picture it clearly, and a resultant focal length of 6 meters. 

JMB
In reply to: Message from "Stanislaw B.A. Stawowy" <watteau@krakow.neurosoft.net> (Re: [Leica] Leica lens turned into a telescope - can it be done?)