Adamsadapters Kowa Prominar 55S Big EyesThe Kowa 55S Big Eyes, with 17 40 variable eyepieces and fluorite crystal, this set up has it all in a compact foot print. The widest field of view of all the compact "Big Eyes" and a narrow pupillary distance that will fit just about anyone. With the precision CNC machined adapter you can turn two Kowa TSN 55S Spotting Scopes into a pair of "Big Eyes". Full set up will require final set up and collimation by customer. Scope Features: Fluorite Crystal