Features: High performances F1.4 large aperture standard 50mm prime lens supports full frame. Lens structure: 6-group of 7 element, filter size: 55mm. Optical glass lens and multi-layer coating technology are adopted to effectively improve the light transmittance and control backlight of double images. The lens adopts gold-plated contact and high-precision metal bracket, wear-resistant, corrosion resistant and durable. Metal structure design, fine workmanship and compact design enable you to put the lens in the bag, which can be used for shooting such as portraits and photos. Specifications: Material: Magnesium Aluminum Alloy+Optical Glass+Multi-layer Coating Size: Mixed Size Focal Length: medium and telephoto fixed focus Full Frame: support Focal Length: 50mm Filter Size: 55mm Aperture Range: F1.4-22 Nearest Focusing distance: 0.45m Optical Structure: 7-element in 6-group Applicable Bayonet: E-mount, F-mount, EF-mount(optional） Lens Purpose: portrait, photo Anti-shake Function: no Full Frame: Support Package Includes: 1x 50mm F1.4 Lens 1x Front Cover 1x Rear Cover 1x Lens Bag note: Please allow 0-1cm error due to manual measurement, make sure you do not mind before you order. Please allow slight chromatic aberration due to different display resolutions.