For your consideration is a Wild Heerbrugg (Leica) traverse kit with hard case:
-Two GDF22 tribrachs with optical plummets. Used of course. One focus ring has electrical tape on one, none on the other. You will see minor plastic cracking on the one without, but it does not affect it. The one with tape has cracking as well. Both work absolutely perfectly as it's just cosmetic. One tribrach has all of the service stuff documented on the bottom, the other I had removed for some reason. This documentation was from the previous owner.?ÿ
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-Two adjustable prism carriers set to the "T2" line. Used of course. The bayonet is held in place with a grub screw that I covered with a piece of electric tape to keep dirt out. You can remove the tape if you like. The "T2" line is where it needs to be set for all modern Leica total stations to maintain your vertical heights. Therefore, it is compatible with all modern Leica total stations as it currently sits.
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-One Wild Heerbrugg GPR1 prism and one Leica GPR1 prism held in new GPH1 holders and used Wild GZT4 target plates. The prisms are identical in function. The Wild Heerbrugg glass is darn near perfect cosmetically, but the Leica has some slight surface marks in the glass. I have not noticed any performance difference between the two. Evidence of use and some pink paint is on both prism assemblies. Inventory tags on back of prisms.
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-Case; used with working latches and handle. Interior is in perfect condition. Heavy.
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Bubbles and optical plummets should be verified by you before you start making money with this setup. It served me well, but you should confirm it for yourself. Note: In the pictures, the tribrachs are not sitting on a level surface.
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It's a decent, high quality setup to get your career going, or, to keep as spares.
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I'm asking $650 shipped to the lower 48.?ÿ
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Please message for more pictures if needed. I uploaded two pictures that will be visible if you are logged in.
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I??m interested but is have a few questions.
I just joined so I??m not allowed to send a message yet.
I??ll try to message you later?ÿ
What year did they add the anti-reflective coating? The basic difficulty of aiming a non-Leica prism too precisely is that the EDM sees the face of the glass and not the center of the prism and boom we are oddly off off by 34.5mm for that shot in the starnet results and wondering why.
Welcome to the Swiss way of thinking.?ÿ Not trying to be sarcastic.?ÿ See these papers
In Swiss mathematics 34.5 mm = 0.0 mm.?ÿ Long time ago I surrendered and only have Leica prisms.?ÿ Actually, I had only Leica everything.?ÿ I believe a put at least one salesman's children through college.?ÿ I am also a long time StarNet user, so I understand the frustration.
If I misunderstood the problem I apologize.?ÿ?ÿ
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No worries. My solo shop is Leica and well versed in how the Leica 0 = -34.5mm. My question has to do with the glass: Did Wild use the same anti-reflective coating on the prisms that Leica uses today? I went on a three hour cruise of testing the offset with a different brand prism, but even with that determined, got too many errors where the Leica EDM saw the face of the prism and not the node. In addition to that error of a tenth that happened if the prism was aimed directly and not 10 degrees off to the side, the prism in question would not return a distance beyond 600 feet so I read up on Leica prisms, discovered the previously unknown to me anti reflective coating on Leica and their reasoning for a copper backing, and went back to the tried and true Leica glass.
I couldn't say about the coating.?ÿ My first Leica instrument was paired with Calson software and Sokkia prisms.?ÿ Once it became obvious the possible missteps with prism constants, we moved to all Leica prisms.
difficulty of aiming a non-Leica prism too precisely is that the EDM sees the face of the glass and not the center of the prism and boom we are oddly off off by 34.5mm for that shot
It probably won't be exactly 34.5 in most cases. It depends on the index of refraction and depth of the prism. Various prisms can be mounted to have the same desired standard offset, resulting in different front face distances.
Leica has had that offset going back 40+ years, why it wasn't adopted by everyone is a bit of a mystery. Once you understand why they did the 34.5 mm offset it makes sense technically. Lots of things with Leica at first seem strange, BUT while it may be different than other manufacturer's, especially in the USA market, they are usually right, I learned long ago to accept and move on and usually later, sometimes much later I understand why they did something that seems odd.
SHG