Features: Designed for use with full frame digital cameras. May also be used with smaller APS-c size sensors with a corresponding effective increase in focal length to about 17-35mm with most cameras A splash-proof design allows for use in harsh conditions. One SLD and Four FLD glass Minimum focusing distance of 11 inches Technical Details: Brand Name: Sigma Model: 12-24mm Nikon Lens Type: zoom Minimum focal length: 12 millimeters Maximum focal length: 24 millimeters Weight: 668.0 grams