Getting your shots leveled for architecture,.. aargh

I just remembered. There is a caveat to using this device. It needs a reference surface to zero it to. That could be a problem in the field. If you can find a vertical or horizontal surface that is plumb, you could use that. Once you have it zeroed, you could leave it on for the rest of your shooting session. I think battery drain is very small. Perhaps zero it before you leave home/work on a shoot.

As for mounting it, I have two ideas. The digital level has magnets on bottom and on one side for holding to a steel surface.

1. If you use a Kirk or RRS L-bracket, you could bolt a 1/8" thick steel plate (just large enough for the magnets) onto a quick release bracket. Clamp the bracket on the side of the L-bracket not being used. The side magnets would attach steel plate. You would need to use a flat-head 1/4-20 machine screw and countersink the plate.
2. You would have to fabricate a flash shoe with a metal plate attaced. 

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Robin Casady
http://www.robincasady.com/Photo/index.html