Where do all these crazy instruments come from ? :-S and what would you use something like this for ?
> Where do all these crazy instruments come from ? :-S and what would you use something like this for ?
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> Zeiss Jena Ni 007 (ebay link)
Looks like a periscope level to me. Various manufacturers made a similar-looking instrument with the compensator being a longer vertical pendulum than the more compact design used in the Zeiss Oberkochen Ni2
That's probably one of the most precise leveling instruments ever made.
> That's probably one of the most precise leveling instruments ever made.
It was a second-order level, though, wasn't it? The Zeiss (Jena) Ni 002 was a more precise instrument. The Ni 007 only had a 32x telescope with a 40mm aperture.
At 3.9 kg, it would have been nearly twice as heavy as the the Zeiss (Oberkochen) Ni 2.
The Italians - Filotechnica ........ made some like that as well. I forget the full name - sorry about that.
> The Italians - Filotechnica ........ made some like that as well. I forget the full name - sorry about that.
I have one of those. I bought it on ebay because I didn't know what it was. I haven't actually played with it much, it's been sitting on a shelf for years. If anyone wants to know more about it, I can pull it out and see what I can learn.
I've used one but much preferred the NI 2.
Pointing to staff was much easier on the NI 2
That said the NI 007 was a very good level..
Probably biggest issue was wind. It vibrated more due to the sheer size.
> > The Italians - Filotechnica ........ made some like that as well. I forget the full name - sorry about that.
>
> I have one of those. I bought it on ebay because I didn't know what it was. I haven't actually played with it much, it's been sitting on a shelf for years. If anyone wants to know more about it, I can pull it out and see what I can learn.
The two Italian periscope design auto-levels I'm aware of are the 5173 (3rd order) and the 5190 (2nd order) made by Salmoiraghi. I'd be interested to see pictures of either.
> I'd be interested to see pictures of either.
There were at least 7 different levels made by Filotechica Salmoiraghi, Milano.
The standard devation of 1 km of leveling is given after each inst. below as + or minus 5mm etc.
5150-A +/- 5mm
5173 +/- 5mm
5153-B +/- 4mm
5168 +/- 2mm
5169 +/- 1.3mm
5190 =/- 0.3mm ; You will find a picture of this one on page 176(Fig. 463)
of "Surveying Instruments" by Fritz Deumlich, 1982
Also on ebay you will find a 5172 (I have no spects on it but I am sure a internet
search will come up with something). Ebay # 201228758024
JOHN NOLTON
Tombstone, AZ
> The two Italian periscope design auto-levels I'm aware of are the 5173 (3rd order) and the 5190 (2nd order) made by Salmoiraghi. I'd be interested to see pictures of either.
Here's another to add to your knowledge collection: a 5172. I don't know what order specs it meets, but it seems like an engineering-grade instrument.
The horizontal circle reads direct to 10 minutes:
My favorite, the label on the back of the case:
Edit: John beat me to it while I was taking photos!