Description
The Stonex 38 mm Mini Prism Set (STPSMINI105A) is a mini prism made by Stonex (part number 30-030004 (STPSMINI105A)).
It can be set up in two positions, giving an absolute prism constant of 0.0 mm or -30.0 mm (+34.4 mm or +4.4 mm on the Leica scale). Always check which position is in use before measuring.
Specifications
| Model: | STPSMINI105A Mini Prism Set |
| Manufacturer: | Stonex |
| MPN: | 30-030004 (STPSMINI105A) |
| Status: | Current |
| Absolute constant: | +0.00 mm or -30.00 mm |
| Leica constant: | +34.40 mm or +4.40 mm |
| Two mounting positions. Check which one is in use before measuring. | |
| Constant source: | Dealer listing |
| Prism diameter: | 38 mm |
| 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
Stonex 38 mm Mini Prism Set (STPSMINI105A) FAQ
Below is a list of frequently asked questions about Stonex 38 mm Mini Prism Set (STPSMINI105A).
What is the prism constant for the Stonex 38 mm Mini Prism Set (STPSMINI105A)?
The Stonex 38 mm Mini Prism Set (STPSMINI105A) has two mounting positions. The absolute prism constant is 0.0mm or -30.0mm. The Leica constant is 34.4mm or 4.4mm.
Can I use the Stonex 38 mm Mini Prism Set (STPSMINI105A) with a Leica instrument?
Yes, just set the prism constant to 34.4mm (or 4.4mm in the second position).
