Amazon.com : Commander Optics 650-1300mm (w/ 2x- 1300-2600mm) f/8-16 HD Telephoto Zoom Lens for Pentax K-1, K-S2, K-S1, K-500, K-70, K-50, K-30, K5 IIs, K-7, K-5, K-3 II, K-2, K110D and K10D
Amazon.com : 500mm f/8-32 HD Preset Telephoto Lens for Pentax K-1, K-S2, K-S1, K-500, K-70, K-50, K-30, K5 IIs, K-7, K-5, K-3 II, K-2, K100D, K110D and K10D Digital SLR Cameras :
Amazon.com : Pentax K-50 16MP Digital SLR Camera Kit with DA L 18-55mm WR f3.5-5.6 and 50-200mm WR Lenses (Black) : Electronics
Amazon.com : Pentax K-3 Mark III Flagship APS-C Silver Camera Body - 12fps, Touch Screen LCD, Weather Resistant Magnesium Alloy Body with in-Body 5-Axis Shake Reduction. 1.05x Optical viewfinder with 100% FOV :