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Subject:
Looking for LARGE lenses for a telescope mockup
From:
Marc Taylor <[log in to unmask]>
Reply To:
Informal Science Education Network <[log in to unmask]>
Date:
Thu, 25 Jun 2009 17:41:21 -0400
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ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
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I'd like to make a big version of a Galilean telescope for the exhibit hall behind the planetarium. I have plano-convex and plano-concave lenses from a optical bench kit, 50mm diameter, focal length 50cm, but it's been suggested that a larger lens by used, say 10cm, with a similar half-meter focal length.

Most of the kits I've seen come with 50mm lenses. Anyone have suggested sources for larger, optical-quality glass lenses?

Marc Taylor
Coordinator, Andrus Planetarium
Hudson River Museum
511 Warburton Avenue
Yonkers, NY 10701
914 963 4550 x223
Fax 963 8558
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