Optical-Squares

Optical-Square GP1
Double pentagonal prism in metal housing

As GP with view to the ground

Like GP1, however Prisms not silvered at top and bottom.

As GP2 with additional View to the ground

Optical-Square GP3, double pentagonal prism in metal housing.

As GP3 with additional view to the ground

Double pentagonal prism in construction accuracy

Double pentagonal prism, Accuracy: 2-3'

Optical-Square GP7

Cross sight prism.

Folding double pentagonal prism with free view between the prisms

Curve-Mirror GKS, to stake out all curves.

Plumbing-Rod,1,60m, with socket pin for optical squares

Plumbing-Rod,1,50m, rigid, with socket pin for optical squares

Plumbing-Rod,1,70m, with socket pin for optical squares

Plumbing-Rod,1,70m, with socket pin for optical squares

Plumbing rod with inclined adaptor

Leather bag
soft leather with zipper

Leather-Case for all Optical-Squares