ESAW  Polarizer and Analyzer (LO-5531)

This apparatus consists of two identical units, each provided with Polaroid disc mounted in a rotatable mount, with aperture of 25mm. Both rotatable mounts have a lever to add rotaon and a pointer which traverses a 75mmdiameter brass silvered scale divided into 360°×1. The size is universal and can be fied to any size of collimator and telescope. To fit over the object end of telescope and colimator.