Fotasy C-Mount 16mm Cine Movie Lens to Pentax Q/Q10/Q7/Q-S1 Mirrorless Digital Camera Adapter Fotasy Professional designed C-Mount Cine Movie lens (such as Schneider, Kodak, Bolex, Zeiss, Canon, Fujinon, movie lens) to Pentax Q, Q10, Q7, Q-S1 Mirrorless Digital Camera adapter ring There is no electrical contacts in the extension tubes. Exposure has to be adjusted manually. Aperture control is not available if you use a lens which does not allow you to manually adjust the aperture (without an aperture ring). Fits Pentax Q, Pentax Q10, Pentax Q7, Pentax Q-S1 Allows lens focus to infinity. The actual focus distance may not be the same as distance show on lens. User need to use LCD for correct focus. Fits C-Mount 16mm Cine Movie lens