My only concern is that the image of the sun is focused inside the scope on
the crosshairs. If they are delicate they may get cooked.
Rick
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-----Original Message-----
From: r.prevost@... [mailto:r.prevost@...]
Sent: Wednesday, 28 March 2001 20:58
To: OAFs@...
Subject: [OAFs] Finderscopes for solar projection?
Just wondering about whether anyone knows if a finderscope can be used
safely to project the image of the sun onto paper. Isn't a
finderscope like a tiny refractor? It should be able to project a
clear enough image of the sun to see sunspots.
What I don't know is if such a procedure would eventually damage a
finderscope or not. I guess it depends alot on the apeture of the
finderscope. One of my books "City Observing" ( Sky & Tel press )
says that inexpenive "refractors" 40mm to 60mm should present no
problem. Just be careful not to look through it though.
Later,
Rol
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