Pentax SMC XW 10mm Wide Angle Eyepiece (1.25") - 39x w/ 65mm, 50x w/ 80mm, & 63x w/ 100mm Pentax Scopes Williams Sound EAR010 Use 58mm Filters on 40

Use 58mm Filters on 40

UPC: 757120298045

Up to 30-40 dB of Wind Noise Reduction

as those models have a built-in

Zoom Speed Control and Reverse Switch

Pentax SMC XW 10mm Wide Angle Eyepiece (1.25") - 39x w/ 65mm, 50x w/ 80mm, & 63x w/ 100mm Pentax Scopes Williams Sound EAR010 Use 58mm Filters on 4070 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