Microscope Adapter 0.5X C Mount for Trinocular Binocular CCD Camera Eyepiece Len
It can be used in all eyepiece position with 23.2mm or 30mm or 30.5mm, 0.5x magnification to get a more wide of view. This item has two adapters: 23.2 turn to 30mm and 23.2 turn to 30.5mm.