1. Made of high quality metal material, durable to use. 2. Let the focus be infinite, but auto focus is not available. 3. Lens locked / released, tighten or loosen screw. 4. Manually setting aperture control of lens. 5. Completely manual control, manually focus and exposure. 6. For Pentax K-3, K-30, K-50, K-5 II, K-5 IIs, K7, K-S1, K-r, K20D, K100D.
