F1.4 Bright and Large Aperture Real bokeh Background blur helps to highlight the subject easily. Even in low light environment, you can take photograph with low sensitivity and relatively high shutter speed. USB Firmware Upgrade This lens is equipped with USB port. To keep best performance and compatibility of this lens, you can download the latest firmware and update this lens independently. Live View Focusing (Lv) This lens supports live view focusing (Lv). When Lv mode is on, this lens can focus from special angles, or focus precisely from the broadened view on the display screen. Electromagnetic Aperture, Automatic Exposure Shooting This lens is built-in with electromagnetic aperture, which supports M/Av/Tv/P/B shooting mode. Glass Optical Lens, Multilayer Coating The whole series of this product adopts glass optical lens and multilayer coating technology to effectively increase light transmittance and control backlight ghost image and glare. 7pcsof Diaphragm Leaves This Lens has 7 pcs of diaphragm leaves, which helps to take picture of circular defocused spots as well as 14-star effect if you stop down the aperture. Gold-plated Contact, Durable Metal Mount This lens adopts gold-plated contact and high-accuracy chrome-plated metal mount. It's wearable, corrosion-resistant, and highly consistent with the camera. Focus Modes: Auto Focus (AF) and Manual Focus (MF) This lens supports auto focus and manual focus. The focus mode can be selected according to practical requirement. Focus Distance Indicator This Lens is equipped with focus distance indicator, which helps you to judge the distance and accomplish manual focus.