Description
The Topcon Prism-5 (プリズム5型), 1.5-inch prism, e.g. in Topcon pin pole prism set 5型 is a survey prism made by Topcon.
Its absolute prism constant is 0.0 mm, which is +34.4 mm on the Leica scale.
Specifications
| Model: | Prism-5 |
| Manufacturer: | Topcon |
| MPN: | Unknown |
| Status: | Current |
| Absolute constant: | +0.00 mm |
| Leica constant: | +34.40 mm |
| Constant source: | Dealer listing |
| Maximum range: | 500 m (1.3-500 m (GT series datasheets)) |
| ATR / tracking range: | 500 m |
| Mount: | Tilt holder 5型 / pin pole 5型 |
| Equivalents: | STS ST-5 (third-party compatible, constant ±0) |
| Last verified: | 21/10/2026 |
Notes:
- The prism constant comes from a dealer listing and has not been confirmed in manufacturer documentation. Check the label on the prism before relying on it.
Sources
Topcon Prism-5 (プリズム5型), 1.5-inch prism, e.g. in Topcon pin pole prism set 5型 FAQ
Below is a list of frequently asked questions about Topcon Prism-5 (プリズム5型), 1.5-inch prism, e.g. in Topcon pin pole prism set 5型.
What is the prism constant for the Topcon Prism-5 (プリズム5型), 1.5-inch prism, e.g. in Topcon pin pole prism set 5型?
The absolute prism constant for the Topcon Prism-5 (プリズム5型), 1.5-inch prism, e.g. in Topcon pin pole prism set 5型 is 0.0mm. The Leica constant is 34.4mm.
Can I use the Topcon Prism-5 (プリズム5型), 1.5-inch prism, e.g. in Topcon pin pole prism set 5型 with a Leica instrument?
Yes, just set the prism constant to 34.4mm.
