YONGNUO YN35mm F1.4C DF uhm Ultrasonic AF Lens -- YONGNUO YN35mm F1.4C DF uhm equipped with ultrasonic wave motor Equipped with ultrasonic wave motor which makes focusing faster, more precise and quieter . Electronic Focus Ring The electronic focus ring, combined with the appropriate damping, allows you to enjoy lightweight, high-precision manual focus without losing the delicate feel. F1.4 Bright Aperture Bokeh can be obtained easily to highlight the effect of the subject, in low light conditions, you can also use low sensitivity and higher shutter speed for shooting. Aspherical Lenses Equipped with 2 aspherical lenses, which can effectively compensate for a variety of aberrations. Abnormal Dispersion Adopts 2 abnormal dispersion lenses, which not only effectively suppresses the problem of lens dispersion, but also improves the secondary spectrum. Glass optical lens, multi-layer coating The whole series of this product adopts optical glass lens and multi-layer coating technology to effectively increase light transmittance and control backlight ghosting and glare. USB Firmware Upgrade Equipped with USB port. You can download the latest firmware from YONGNUO official website and update the lens. Live View Focus (Lv) Turn on live view, you can see the subject through the camera monitor, easy for you to focus on special angles. 7pcs of Aperture Blades Adopts 7 aperture blades, which can take photos of defocused circular dots as well as the 14 star effect if you stop the aperture. Gold-plated contact, metal bracket This lens adopts gold-plated contact and high-precision chrome-plated metal bracket, which effectively increases signal conductivity, corrosion resistance and durability. Supports Quick AF (AF) and Manual Focus (MF) Modes. Support auto focus and manual focus, you can select the focus mode according to your own shooting needs. Focus Distance Indicator This lens is equipped with a focus distance indicator, which makes it easier for you to judge the distance to the subject and use manual focus.