Glass pentaprism

• Precise 90 degree deviation • Designed for 400-700 nm Penta Prisms deviate an incident beam through 90° without inverting or reversing it. They also show constant deviation (i.e. the beam is deviated through 90° irrespective of the orientation of the prism). The accuracy of the 90° deviation is therefore only dependent on the manufacturing tolerances of the prism. These prisms are extremely useful when precise orientation of the prism is not possible and also where the path length through an instrument needs to be shortened. Typical applications include range finding, surveying, alignment and cinephotography. The reflecting faces are coated and the entrance and exit faces have an antireflection coating optimized for 400-700 nm. Specifications Material: BK7 glass Dimension Tolerance: +0 / -0.254 mm Surface Flatness: λ/4 Angular Tolerance: <10 arcsec Clear Aperture: > 85% of central dim.