Compatible with Sony E mount full frame auto focu mirrorless cameras, such as Sony A9 A9II A7III A7II A7RII A7 A7R3 A7R4 A7IV A7C A7CII A7SIII series cameras, also works with APS-C frame cameras like Sony A6500 A6400 A6300 A6000 The classic 55mm portrait lens with a wide aperture of f/1.8, the lens can capture beautiful photos with smooth background blur effect, even in dark environment 55mm lens is a AF STM stepping motor auto focus lens, helps to reduce camera shake and helps capture images with less noise Uncompromising Optical Design: The use of 11 elements in 8 groups, 2 extra-low dispersion elements,2 high refractive index element and multi coating suppress chromatic aberration,flaring and ghosting effectively. If you experience autofocus failure, you can upgrade the firmware online. Meike lenses use a Type-C interface, and the latest firmware is available for download from the Meike official website（Real-time updates）, only supported on Android devices, not Apple (Mac). ◆Product features Drive system: SMT stepper motor Focus type: automatic/manual Aperture type: automatic/manual ◆Image quality performance Breathing effect: zero breathing Distortion control: zero distortion Glare suppression: good Ghost suppression: good Dispersion purple fringing: good (slight at extreme high contrast) Vignette control: excellent Resolution: 8K Color reproduction: neutral