Lightweight Design For PortraitAll-Metal Construction Textured and lightweightIdeal for Portrait MastersTTArtisan Af 75mm F2 Full-frame, With excellent optical design and fast, silent focusing, this lens easily produces sharp and vibrant images. Stm Autofocus Focus Excellent Optical Design F2.0 Large Aperture Portrait Focal Length Chromatic Aberration Control Supports Af DetectionThe 75mm focal length is often regarded as the gold standard for portrait photography, perfectly capturing the proportions and details of the subject. Whether for close-ups or full-body shots, this focal length captures the subject's natural beauty.Wide Open Aperture - Excellent Sharpness and ResolutionTTArtisan Af 75mm F2 features an optical structure of 10 elements in 7 groups, including 1 Extra Low dispersion (Ed) element and 4 high index elements, which can effectively reduce dispersion and chromatic aberration and improve image quality.