Opticron Waterproof Case for MM3/MM4 60 Travelscope - Black 85mm_portrait_lens 4 is Nikon's classic fast

4 is Nikon's classic fast standard prime in AI mount - 50mm focal length

9m and the straight-through body design is favoured for astronomical use

What's the difference between the Mk II and Mk III

The PF-driven weight saving

Weighing just 130g and measuring 46

Opticron Waterproof Case for MM3/MM4 60 Travelscope - Black 85mm_portrait_lens 4 is Nikon's classic fastA custom fit waterproof case for Opticron MM3 and MM4 60mm straight travelscope bodies. The padded rigid construction protects your scope from impacts, moisture, and dust during transport and storage. Sized precisely for 60mm straight body travelscopes (model reference 96). The waterproof shell keeps your scope safe during rain or damp conditions.