Pentax 20mm XW extra wide angle eyepiece | Astronomics.com
Pentax - SMC XF 8.5mm Eyepiece | Telescopes
Pentax XW30-R 30mm Wide-Angle Eyepiece (2") 70537 B&H Photo Video
Amazon.com : PENTAX smc PENTAX XW40-R, 2-Inch Eyepiece for Telescopes High-Performance Eyepiece with an Extra-Wide 70°Apparent Angle of View, 20mm Eye Relief Original Multi-Layer Coating All-Weather Made in Japan : Electronics