Pentax SMC XW 10mm Wide Angle Eyepiece (1.25") - 39x w/ 65mm, 50x w/ 80mm, & 63x w/ 100mm Pentax Scopes Williams Sound EAR010 The Ethos 21mm is a

The Ethos 21mm is a logical choice for owners of the 8mm and 13mm eyepieces

as those models have a built-in

This is the black

The kit is comprised of three LED500 lights

Opacity: >96%

Pentax SMC XW 10mm Wide Angle Eyepiece (1.25") - 39x w/ 65mm, 50x w/ 80mm, & 63x w/ 100mm Pentax Scopes Williams Sound EAR010 The Ethos 21mm is a70 Apparent Field of View 20mm Eye Relief Waterproof & Fogproof Fits Pentax Spotting Scopes Pentax premium spotting scopes adhere to the American standard of 1. 25" eyepiece thread diameter, facilitating the use of eyepieces from independent manufacturers. That also means, of course, that the wonderful Pentax eyepieces can be used in other telescopes and spotting scopes which accept 1. 25" eyepieces. Pentax eyepieces are a near consensus choice