11 Elements in 8 GroupsIdeal Aperture with 12 Diaphragm Blades and Multi Layer CoatingAluminum Body and Copper Core. Compact and Lightweight 0.6oz/275gAperture Range: F2.8-22. Closest Focus Distance: 0.12m. Widely Focus within 180 DegreeFor Sony A7, A7II, A7R, A7RII, A7S, A7SII, Please Switch to APS-C Frame Before Use11 Elements in 8 GroupsIdeal Aperture with 12 Diaphragm Blades and Multi Layer CoatingAluminum Body and Copper Core. Compact and Lightweight 0.6oz/275gAperture Range: F2.8-22. Closest Focus Distance: 0.12m. Widely Focus within 180 DegreeFor Sony A7, A7II, A7R, A7RII, A7S, A7SII, Please Switch to APS-C Frame Before Use