Where to buy lenses for building Galilean telescope?

[geomouchet]

My daughter is building a Galilean telescope as a project for her history class. I found plans, but where do I get the lenses? They call for one concave convex lens, 49mm diameter and 1,350 mm focal length. Also one plano concave eyepiece lens, 49mm diameter, 152 mm focal length.

[iwatkins]

Have you tried eBay as a first off?

If not, try Curious Minds Science Shop they tend to have small lens kits, prisms etc.

If you have time, you may find what you need at: Surplus Shed but bear in mind this is in the USA.

Cheers

Ian

[Peter Drew]

Ian Poyser is worth a try.