500mm f/8.0 Manual Focus Telephoto Lens with T-Mount to Pentax K-Mount Adapter Kit

The Bower 500mm f/8.0 Manual Focus Telephoto Lens with T-Mount to Pentax K-Mount Adapter Kit from B&H pairs the 500mm fixed f/8.0 mirror lens with a T-mount to Pentax K-mount lens mount adapter to make a compact super telephoto lens that is compatible with both full-frame and APS-C-size cameras. The combination creates a super telephoto lens that can be easily carried into the field in a shoulder bag, backpack, or even a coat pocket.