WILLIAM OPTICS 1.25" 90° ERECTING PRISM Chroma a precise 40mm hole offers

a precise 40mm hole offers a smooth movement on the shaft and facilitates the balancing operations while the stainless steel guarantees no corrosion

As well as its superb imaging capability

Due to the particular design

Wi-Fi external antenna

WILLIAM OPTICS 1.25" 90° ERECTING PRISM Chroma a precise 40mm hole offersThe William Optics 1. 25" Erecting Prism is a high quality 90 image erecting BAK4 prism with anti reflection coatings for premium refractors. The helical focuser mechanism on the top barrel makes fine focusing quick and easy. Meticulously CNC machined and anodized black, internally matte blackened and threaded for no stray light reflection, the 1. 25" erecting prism is an exceptionally well constructed piece of equipment. The compression ring prevents