Try Learning Technologies at 800-537-8703. Their Project Star catalog has
both types of lenses and make-you-own-telescope kits as well.
__________________________________
Amy Southon
Manager, School & Teacher Services
Chicago Botanic Garden
1000 Lake Cook Road
Glencoe, IL 60022
(847) 835-6832
[log in to unmask]http://www.chicagobotanic.org
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