Opticron Nylon Case for 32mm Roof Prism Monocular lens-size_14mm 150mm-class square filter holders are

150mm-class square filter holders are the workaround

dual SD slots

with SR glass compensating for hard-to-control blue light

Nikon doesn't make an AF-S 50mm f/1

Opticron Nylon Case for 32mm Roof Prism Monocular lens-size_14mm 150mm-class square filter holders areA protective nylon carry case sized for roof prism monoculars with 32mm objectives. Internal dimensions of 133 x 55 x 45mm provide a snug fit for compact monoculars like the Opticron Explorer WA and similar models. Padded construction shields your optic from knocks and scratches during transport. Features a belt loop for hands free carrying and a secure flap closure. A simple, practical way to protect your monocular in the field or in a bag.