One of my Leica push-pull focus plummets won't stay focused, it always springs back when I let go. Having to push on it continuously while trying to ...

> Is it a MIL instrument?I don't think so, but I'm not sure. Weren't the units graduated in mils so marked?

> Still, 1/10 of 2 inches is only +-0.02' = 0.04', pretty tough to meet even with terrestrial equipment best practices with intervisible stations. ...

I've bought a couple of used items from overseas, but nothing expensive. In general, I don't trust overseas sellers with anything pricey unless I hav...

> I trust GPS static or fast static observations to +- a few inches or so, if done properlyMy experience puts it about a magnitude better than tha...

> basically a split ring of Delprin that was part of the compression lock on the poleI let you off with a silent warning on the first offense, but ...

> I am curious how the ALTA Standards came up with .07' plus 50/1,000,000.00.I don't have the answer, but note that 0.07 ft. is 2 cm.

> I'd say...less than 30 secondsYou're a lot faster than me. My tripod is like Kent's original, with two quick-release clamps, one thumb-screw cla...

The ScanLook (with a FARO and a Velodyne) appears to be a pretty nice solution, and relatively inexpensive. Plus you can use the FARO by itself for s...

> Agree with J.T.S and Rambleon.Same here. Star*Net doesn't care, AutoCAD doesn't care, so I don't care either. The one concession I make to poin...

> I did have a few conversations about the USGS surveys with a Mr. Keith Williams. Keith had never heard of them and questioned the authority unde...

Kent, I'm curious.....The old 6"x6" concrete California Highway Commission monuments have a brass wire in the center to mark the point.

What do you carry in that gigantic (if gigantically short!) length of PVC with threaded cap?(On second look, I think it's just a threaded cap and adap...

> Now that I think about it I believe the hole was to let excess water in the concrete escape rather than air. I was told the reason a long time ag...

> Any ideas?It's not clear to me whether or not you've tried shooting both BS and FS with the same prism. If not, that'd be the first thing I'd tr...

It's a bench mark, isn't it? The "divots" don't matter, shoot the high spot.

> A Kern E2 in working order for $250 ????? That's just ... mind-blowing."Great used condition" is the way it was described, and the photos support...