INCREDIBLY SHARP: One ED (Extra Low Dispersion), one Super ED and three aspherical elements ensure outstanding resolution in this constant F1.4 aperture, aps-c ultra wide angle lens, making it an excellent Sony E lens for vlogging, content creation, videography stills and photography . BEAUTIFULLY SMOOTH BACKGROUNDS: A circular 7-blade aperture on this Sony 15mm lens creates beautiful background bokeh defocus effects. FAST AND PRECISE AUTOFOCUS: Two Linear Motors deliver fast and accurate focusing. You won't miss a shot with this Sony lens. BRIGHT IN ALL WEATHERS: A constant F1.4 maximum aperture keeps an impressive brightness that makes this an invaluable lens for content creation, stills photography and vlogging. ERGONOMICS: A dust and moisture resistant design, along with versatile controls on this Sony wide angle lens makes it ideal to use in the most difficult scenarios - both indoors and outdoors.