Description
The Topcon ATP2 360° Prism is made by Topcon (part number 210152700).
Its absolute prism constant is -7.0 mm, which is +27.4 mm on the Leica scale.
Specifications
| Model: | ATP2 |
| Manufacturer: | Topcon |
| MPN: | 210152700 |
| Status: | Current |
| Absolute constant: | -7.00 mm |
| Leica constant: | +27.40 mm |
| Constant source: | Dealer listing |
| 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 ATP2 360° Prism FAQ
Below is a list of frequently asked questions about Topcon ATP2 360° Prism.
What is the prism constant for the Topcon ATP2 360° Prism?
The absolute prism constant for the Topcon ATP2 360° Prism is -7.0mm. The Leica constant is 27.4mm.
Can I use the Topcon ATP2 360° Prism with a Leica instrument?
Yes, just set the prism constant to 27.4mm.
