|
|---|
| FOCUS 4 |
|---|
| Telescope | |
| Magnification | 26x (16x/32x w/ optional eyepieces) |
| Effective diameter of objective | 1.57 in (40 mm) |
| EDM | 1.97 in (50 mm) |
| Field of view | 1°30' |
| Resolving power | 3" |
| Minimum focusing distance | 5.3 ft (1.6 m) |
| Distance Measurement | |
| Reflectorless mode (white target)¹ | 5.3 ft to 689 ft (1.6 m to 210 m) |
| Range with specified prisms | |
| Normal conditions² | |
| With reflector sheet (5 x 5 cm) | 5.3 ft to 980 ft (1.6 m to 300 m) |
| With single prism | 5.3 ft to 16,400 ft (1.6 m to 5000 m) |
| Good conditions³ | |
| With reflector sheet (5 x 5 cm) | 5.3 ft to 980 ft (1.6 m to 300 m) |
| With single prism | 5.3 ft to 16,400 ft (1.6 m to 5000 m) |
| Accuracy (Prism/Precise Mode) | ±(3+2 ppm x D) mm |
| | ±(3+3 ppm x D) mm |
| | (-4 °F to 14 °F, +104 °F to +122 °F) |
| | (-20 °C to -10 °C, +40 °C to +50 °C) |
| | ±5 mm: 5.3 ft to 17.4/32.8 ft |
| | (1.6 m to 5/10 m) for reflector sheets/prisms |
| FOCUS 4 |
|---|
| Accuracy (Reflectorless/Precise mode) | ±(5+2 ppm x D) mm |
| | ±(5+3 ppm x D) mm |
| (-4 °F to 14 °F, +104 °F to +122 °F) |
| (-20 °C to -10 °C, +40 °C to +50 °C) |
| Measuring interval4 | |
| Prism mode | |
| Precise mode | 1.3 sec. (initial 2.0 sec.) |
| Normal mode | 0.5 sec. (initial 1.6 sec.) |
| Reflectorless mode | |
| Precise mode | 1.6 sec. (initial 2.6 sec.) |
| Normal mode | 0.8 sec. (initial 2.0 sec.) |
| Least count | |
| Precise mode | 1 mm (0.002 ft) |
| Normal mode | 10 mm (0.02 ft) |
| FOCUS 4 |
|---|
| Ambient temperature range | –4 °F to +122 °F (–20 °C to +50 °C) |
| Atmospheric correction | |
| Temperature range | -40 °F to +140 °F (-40 °C to +60 °C) |
| Barometric pressure | 400 mmHg to 999 mmHg |
| | 533 hPa to 1,322 hPa |
| 15.8 inHg to 39.3 inHg |
| Angle measurement | |
| Horizontal angle | Single |
| Vertical angle | Single |
| Minimum decrement | Degree: 1/5/10" |
| | Gon: 0.2/1/2 mgon |
| | MIL6400: 0.0005/0.02/0.05 mil |
| FOCUS 4 |
|---|
| DIN 18723 accuracy | 5"/ 1.5 mgon (horizontal & vertical) |
| Water protection | IPX4 |
| Tilt sensor | |
| Type | Single-axis |
| Compensation range | ±3' |
| Setting accuracy | 1" |
| FOCUS 4 |
|---|
| Level vial | |
| Plate level vial | 30"/2 mm |
| Circular level vial | 10'/ 2mm |
| Optical plummet | |
| Magnification | 4x |
| Display | Graphic LCD (128 x 64 dot); single side |
| FOCUS 4 |
|---|
| Point memory | 10,000 records |
| Dimensions (W x D x H) | Approx. 6.6 in x 6.8 in x 13.7 in |
| | (168 mm x 173 mm x 374 mm) |
| FOCUS 4 |
|---|
| Weight (approx.) | |
| Main unit (with battery) | 10.9 lb (4.96 kg) |
| Tribrach | 1.7 lb (0.7 kg) |
| Clip-on NiMH battery | |
| Model | BC-65S |
| Operation time5 | |
| Continuous distance/angle measurement | Approx. 6.5 hours |
| | (Reflectorless mode: 7 hours) |
| Distance/angle measurement every 30 seconds | Approx. 15 hours |
| | (Reflectorless mode: 16 hours) |
| Angle measurement | Approx. 27 hours |
| | (Prism and Reflectorless modes) |
| Quick charger | Approx. 2.0 hours for full recharge |
| NOTES |
| ¹White objects (Kodak Gray 90%) with high reflectivity. Measuring distance may vary depending on targets and measuring conditions. |
| ²Ordinary haze, visibility approximately 12.5 miles / 20 km. |
| ³No haze, visibility over 25 miles / 40 km. |
| 4Measuring time may vary depending on measuring distance and conditions. |
| 5Battery life specification at 77 °F (25 °C). Operation time may be shorter if battery is not new. |
