Goecke 25MM Leica Style Prism (46-MP)
Goecke Schwelm 25mm Mini Prism w/ 16.9mm Offset
Goecke Part # 46-MP
Target distance 46-MP: approx. 500m
Target distance 46-MP38: approx. 1,000m
Grinding accuracy: < 5“
Recording: 12mm socket
(LEICA compatible)
Tilt-axis height: 86mm
Offset 46-MP: -16,9mm (Leica +17,5mm)
Offset 46-MP38: -34,4mm (Leica 0mm)Roughly 500 meters for the smaller 46-MP found and 1,000 m on this larger diameter 46-MP38 prism Found Here