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Concave Mirror - Glass - 150mm Dia - 150mm Focal Length - Eisco Labs

Q: will this sit flat to spin tops?

Not by itself, the bottom has a slight curve to it. I just set it on a roll of masking tape and it works fine for spinning tops. I'm sure you could fashion something more permanent. The mirror is 6 inches (150 mm) in diameter with a 3x magnification (150mm focal), like a cosmetic mirror but better quality. I have a J.L. Lawson top with low clearance which works well with this shallow concave surface. Though there is nothing keeping a top from skidding off the mirror on a wild spin. Use caution if you have a top with a fragile tip, like ruby or ceramic. Good Luck!

Q: Is this mirror good for telescope making?

A telescope mirror has its reflective coating on the surface of the mirror. This concave mirror has its coating under a layer of glass. It would be good for educational optical experiments. The focal length may not be 150mm though; I got a similar one by another manufacturer and it measured at 120mm.

4.7/5

Product ID: 120920291

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Concave Mirror - Glass - 150mm Dia - 150mm Focal Length - Eisco Labs

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