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MJC

In article ,
says...

Surprise. The range finder won't read off a reflective sign at all,
at any distance. Turned the sign around and it read fine off the
unpainted back. I hadn't expected that.

That's a surprise to me too. I thought the laser range-finding to the
Moon was done using a retro-reflector placed there specially by
visitors. But maybe they did not use a road-sign...

Mike.