Thread: DIY Laser Level
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david lang
 
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Default DIY Laser Level

Ian Stirling wrote:

It won't send a little red dot a hundred feet.
The cheaper units typically have a divergance of around half a
milliradian. For less divergance, you need to be able to focus onto an
objective, and have a bigger lens.
The cheaper ones will do a spot of maybe 5cm at 100m, and this is
trivial to see at dusk.


Mine will shine a red dot onto the chimney of a house at the end of the cul
de sac, well over 100 ft away. Granted I don't know how big the dot is, but
it certainly reaches that distance.

Dave