Eyepiece Orion Sirius Plossl 32mm Orion Telescopes & Binoculars · Sirius Plossl 32mm Key specifications Focal length32 mm Apparent FOV52 ° Barrel size1.25" All specifications Elements4 About 32mm 52-degree Plossl eyepiece; Orion's standard 4-element Plossl line.