A lens adapter for mounting  

Nikon 1 J1/J2/J5/V1/V2 digital camera   on microscopes eyepieces size

Three mounting sizes on microscope side, 23.2mm 30mm,30.5mm

For the adapter, one port is  Nikon 1 J1/J2/J5/V1/V2 digital camera 

Another port is 23.2mm.

Also include two adapters, 23.2mm to 30mm, 23.2 to 30.5mm

Attention it can not use in 100X objective