On Sat, 31 Dec 2005 09:51:29 GMT, "Harry Bloomfield"
wrote:

So
far as I could tell, the beams spead is produced entirely by lenses,
rather than any moving parts. So the line produced is quite dim and not
much use out of doors in daylight.

I was able to get a Stabila brand one when they were being remainderd.
These were professional units with prices to match. Their advantage
over the DIY ones is a brighter beam that could just about be used
outdoors on a dull day. In difficult conditions possible to use the
spot manually rather than the line produced by beam spreading.

Roger