Meller Centrifuge Cell Windows feature an arrow scribed on their edges that projects the optic access to simplify alignment and measure 19.03 mm dia. ±0.3 mm by 0.5 mm thick ±0.10 mm. Click here for ...

Optical Surfaces Ltd offer a range of high precision mounts developed to support off-axis paraboloids, spheres and optical flats up to 600mm diameter in applications where stability is important.

Most hunters obsess over magnification because it’s the easiest number to understand. More power feels like more capability, ...

If a scope is the most important element for rifle accuracy, the scope's mount and rings are just as important. No matter how precise your scope is, it is meaningless if your mounts are faulty, ...