Lomography La Sardina Marathon 300 An Awesome 22mm Wide-Angle Plastic Lens. MX Switch and Rewind Knob - Multiple exposures have never been so easy! Lens Focal Length: 21mm Shutter Speed: Bulb (B), 1/100 (N), Fixed F8 Aperture Focusing Steps: Two Step Focusing - 0.6m-1m, 1m-Infinity