Prism, Prism Holders, & Plummet Tribrachs
Prism
Zero constant prism with 60mm effective diameter and 2 arc-second
accuracy. Precision ground glass mounted in high impact plastic
housing. Male thread.
304-008 Prism 1 lb.
Prism Holders
Single Prism Holder
For short-range horizontal measurements; female thread. Can also
be used reversed with -30mm constant prism.
304-010 Single Prism
Holder 1 lb.
Triple Prism Holder
Triple prism holder for long-range horizontal distance
measurements, with female thread. Can be used reversed for mounting
-30mm constant prism.
304-012 Triple Prism
Holder 1.3 lbs.
Tilting Prism Holder
Single prism holder for short-range slope distance measurements,
with female thread. Tilts ±40°. Can also be used reversed with -30mm
constant prism.
304-014 Tilting Prism
Holder 1.3 lbs.
Tilting Prism Holder - 2
Single prism holder for short-range slope measurements, female
thread. Comes with target plate for use when sighting and
traversing. Tiltable through ±40°.
304-016 Tilting Prism
Holder-2 2 lbs.
Optical Plummet Tribrach
click to enlarge
Has built-in optical plummet telescope of 2.2x, universal focus,
erect image. Circular level of 10'/2mm; fine horizontal adjustments.
Used with tribrach adapter (304-041) for supporting prism holder.
304-018 Optical Plummet
Tribrach 3 lbs.
Non-optical Plummet Tribrach
Has circular level of 10'/2mm sensitivity and 3 leveling screws,
does not have built-in optical plummet. Used with 304-040 Tribrach
Adapter-2 for supporting prism holder.
304-020 Non-optical
Plummet Tribrach 3 lbs.
