On Mon, Aug 03, 2009 at 03:05:07PM -0400, paul stenquist scripsit:
> You should use a bubble level to test it accurately. Flat and level is
> not necessarily flat and level.

For that matter, a hardware store bubble level might not be accurate,
either.  Certainly the cheap plastic torpedo levels aren't particularly
likely to be.

You can either get a good (expensive) level, build a plumb-bob level
(dead accurate; slow and annoying to use), or take the camera some place
where they've already got a level surface.  (Machinist's table, for
example.)

The first thing to try, though, is to rotate the camera so it faces NESW
and see if the amount the level indicates you're off changes.  No change =
level surface, deluded camera.  Change = likely, the camera is right.

-- Graydon

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