Description
The Myzox KIRA640 3D auto-tracking prism is a 360° prism made by Myzox (part number 226551 (Holfee set KR-HLS 226557)).
Its absolute prism constant is -10.0 mm, which is +24.4 mm on the Leica scale.
Specifications
| Model: | KR-640 |
| Manufacturer: | Myzox |
| MPN: | 226551 (Holfee set KR-HLS 226557) |
| Status: | Current |
| Height Offset: | 60.0 mm |
| Absolute constant: | -10.00 mm |
| Leica constant: | +24.40 mm |
| Constant source: | Manufacturer documentation |
| Dimensions (W × H × D): | 67×93×67 mm |
| Weight: | 158 g |
| Mount: | 5/8" Thread |
| Last verified: | 21/10/2026 |
Sources
Myzox KIRA640 3D auto-tracking prism FAQ
Below is a list of frequently asked questions about Myzox KIRA640 3D auto-tracking prism.
What is the prism constant for the Myzox KIRA640 3D auto-tracking prism?
The absolute prism constant for the Myzox KIRA640 3D auto-tracking prism is -10.0mm. The Leica constant is 24.4mm.
Can I use the Myzox KIRA640 3D auto-tracking prism with a Leica instrument?
Yes, just set the prism constant to 24.4mm.
What is the height offset of the Myzox KIRA640 3D auto-tracking prism?
The height offset is 60.0mm.
