Studio : Ginsberg

Publisher : Ginsberg

Product Description
Two 38 mm spherical lenses; one is a double concave, the other a double convex, each with a focal length of 150mm. When placed together the net focal length is zero. (1-1/2" x 1-1/2" x 1/4"; .005Ib). Great for optics experiments in the lab or classroom.
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