Denny Semick on Twitter: "#pentax 800mm just took in on trade. What the heck am I going to do with this! http://t.co/6uyHvRvB" / Twitter
Pentax SMC M* 67 800mm F/6.7 ED (IF) STAR Lens w/1.4x Converter *EX+* | eBay
Sigma 800mm f5.6 APO EX Pentax mount | Gary Chalker | Flickr
Amazon.com : Opteka 420-800mm f/8.3 HD Telephoto Zoom Lens for Pentax K-70, K-50, K-3 II, KP, K-1, K-S2, K-S1, K-500, K-30, K5 IIs, K-7, K-5, K-2, K20D, K100D, K110D and K10D Digital
Pentax 800mm f/6.7 on Digital (PhaseOne IQ180)
Die Cast Pro - Vivitar Telephoto 1:8 f = 800mm
Samyang 800mm F8 Mirror Manual Lens - Pentax Mount
Lightdow 420-800mm F/8.3-16 Super Telephoto Lens Manual Zoom Lens +t2 Adaper Ring For Canon Dslr Cameras Ef Ef-s Mount Lens - Camera Lenses - AliExpress