David White LT8-300, Owner'S Manual

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-5-
FEATURES
The numbering of the product features
shown refers to the illustration of the
instrument on the graphic page.
1. Telescope objective lens
2. Sighting notches
3. Eyepiece
4. Focusing Knob
5. Instrument level vial levers (2)
6. Horizontal circle
7. Horizontal circle lock
8.
Horizontal vernier
9. Horizontal clamp
10. Horizontal tangent
11. Telescope lock
12. Vertical clamp
13. Vertical tangent circle
14. Vertical arc
15. Vertical vernier
16. Shifting center
17. Four leveling screws
18.
5/8-11 thread base
19. Plummet (LT8-300P/LT8-300LP)
TECHNICAL DATA
LT8-300 Series
RANGE:
Up to 400 ft.
ACCURACY:
within 3⁄16 in at 150 ft
(5 mm at 45 m)
TELESCOPE
Length
8-1/2 in (216 mm)
Minimum focus 6 ft (1.8 m)
Aperture
1.257 in (32 mm)
Power
26X
Field of view
1' 9" @ 100 ft
(54 cm @ 30 m)
No. of lenses 8
Stadia Ratio 1:100
HORIZONTAL CIRCLE
Graduation
diameter
4-5/8 in (117 mm)
Graduations Each 1°
Numbers Each 10°, 0-90-0°
Vernier Double direct to 5
min.
LT8-300 Series
VERTICAL ARC
Graduations Each 1°
Numbers Each 10°, 45-0-45°
Vernier Double direct to 5
min.
CENTER
Type Wide-stance dual
row ball bearings
LEVEL VIAL
Accuracy 110-120 sec.
per 2 mm
PLATE VIAL
Accuracy 360 sec.
per 2.5 mm
WEIGHT
Instrument only 9.5 lb (4.31 kg)
TRIPOD
Type Use a heavy-duty
5/8-11 tripod