What's in the box? - Sigma 12-24mm f/4 DG HSM Art Lens for Canon EF - Lens Case Features: - EF-Mount Lens/Full-Frame Format - Aperture Range: f/4 to 22 - FLD and Aspherical Elements - Super Multi-Layer Coating Specifications: Performance - Focal Length: 12 - 24mm - Aperture: Maximum: f/4 - Minimum: f/22 - Camera Mount Type: Canon EF - Format Compatibility: 35mm Film / Full-Frame Digital Sensor - Angle of View: 122 degree - 84.1 degree - Minimum Focus Distance: 9.45" (24 cm) - Magnification: 0.2x - Maximum Reproduction Ratio: 1:4.9 - Elements/Groups: 16 / 11 - Diaphragm Blades: 9, Rounded Features - Image Stabilization: No - Autofocus: Yes - Tripod Collar: None - Physical - Filter Thread: None - Dimensions (DxL): Approx. 4.02 x 5.18" (102 x 131.5 mm) - Weight: 2.54 lb (1.15 kg) - Sigma's third generation 12-24mm f/4 DG HSM Art Lens, available here with a Canon EF mount, refines their ultra-wide arena and delivers an image with little distortion and with a high resolution for crisp photos with a modern full-frame digital image sensor. - A member of Sigma's Art series, it boasts high image quality which is helped out by the use of

and aspherical elements, including an 80mm large-diameter moulded glasses aspherical lens, that minimizes aberrations and distortion. - Furthermore, it uses a Super Multi-Layer coating that minimizes flare and ghosting.