The background effect is good, the is , reaching F2,0, while the main scene, it can integrate more humanistic elements into the picture. The structure is flexible and the length is 35MM, which is a small wide-angle, suitable for indoor and outdoor still life with different themes. When keeping the main subject at close range, people and the scene can be included in the mirror. The fixed-focus lens is a full-frame lens, and the optical structure adopts the reverse telephoto type. Structurally, there are 5 groups of 8 elements, including 3 groups of glued parts, including 1 piece of low dispersion glass, 2 pieces of ultra-high refractive index, heavy lanthanide glass, which effectively reduces chromatic aberration and increases the maximum of the lens. Filter size: 55MM Lens structure: 8 elements in 5 groups Maximum : F2.0 length: 35MM Mount used: Closest focus: 0.25M Frame: full frame Lens use: human environment portrait Colour:black Material:metal+glass Package Contents: 1 x Lens Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.