42mm 2" Superview Camera Projection Lens 

A quality wide angle Superview eyepiece with full multi-layer coating. Can be used as a normal eyepiece or to use for eyepiece projection photography it has an external extendable sheath with a removable cap. This reveals a M57 thread. Use the optional Camera Adapters for connecting to your camera (either 42T or 52T).

Focal Length  =  42mm
Barrel Size  =  2"
Apparent  FOV  =  68°
Eye Relief  =  20mm
Group  =  5-elements
Filter Thread  =  Internal thread suitable for 2" filters