The background effect is good, the is , reaching F2,0, while the main scene, it can integrate more humanistic 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 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 , including 3 groups of glued parts, including 1 piece of low dispersion glass, 2 pieces of ultra-high refractive , heavy lanthanide glass, which effectively reduces chromatic aberration and increases the maximum of the lens.Filter size: 55MMLens structure: 8 in 5 groupsMaximum : F2.0 length: 35MMMount used: for Closest focus: 0.25MFrame: full frameLens use: human environment portraitMaterial: Metal+glasscolour: blackPackage Contents:1 x LensOnly 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.