【High-Quality Wide-Angle Lens】 The SIGMA 16mm F1.4 DC DN is the perfect lens for wide-angle photography. Its large aperture of F1.4 allows for excellent performance even in low-light environments. 【Compact Design】 The lightweight and compact design makes it easy to carry, ideal for travel and everyday shooting. 【Abundant Accessories】 It comes with a user manual and warranty card, so you can use it with peace of mind. - Brand: SIGMA - Model Name: 16mm F1.4 DC DN - Filter Diameter: 67mm - Series: Contemporary - Lens Cap: Included - Accessories: User Manual, Warranty Card Thank you for viewing. I have never used it and it has been stored away.