With a penchant for capturing striking wide-angle views, Opteka’s 12mm f/2.8 lens for Panasonic Micro Four Thirds brings an impressive and fresh perspective to your photography. Featuring an optimized design, this lens uses a series of 12 optical glass elements (one SD super-low dispersion) in 10 groups to reduce chromatic and spherical aberrations throughout the aperture range. Its aperture control ring enables smooth adjustments during shooting. A 9-blade aperture diaphragm set to f/5.6 and everything from 1.4 feet to infinity is in focus. HD anti-reflective coating ensures that veiling, flare and ghosting are minimized while the manual focus and aperture ring provide the ability to gain precise control over your focus and exposure. An ultra-soft nylon pouch with protective lining safely stores the lens for travel. Specifications Focal Length: 12mm Maximum Aperture: f/2.8 Structure: 12 Elements in 10 Groups Aperture Blades: 9 Angle of View: 99 Degrees Diagonal Coating: HD Anti-Reflection Focus: Manual Format: APS-C Construction: Metal Body and Mount Filter Diameter: 72mm Minimum Distance: 3.9 in. (0.1 m) Dimensions: 3.1 x 2.9 in. We will respond to you within 24 hours and do our best to help you out! We are committed to your 100% Satisfaction and will do whatever we can to meet that commitment. Hopefully, our feedback is a testament to that effect.