🏆【YONGNUO 17mm lens for M4/3 mount】YONGNUO YN17MM F1.7M lens for M4/3 mount. 17mm focal Length; With the F1.7 large aperture, you can easily achieve a soft and beautiful blur effect. Allows you to shoot at low sensitivity and higher shutter speeds even in low-light environments. With 10 optical lenses in 9 groups structure design and nano multi-layer coating process. | 🏆【Small size and light weight】About φ65.8×77.8mm; The net weight is about 180g, not only easy to carry, but also suitable for time hand-held shooting. The compact lens allows you to shoot outdoors all day long. Equipped with 2 low dispersion lenses，which can better suppress the dispersion problem caused by wide angles. | 🏆【F1.7 large aperture, support AF and MF Mode】 With 10 optical lenses in 9 groups structure design and nano multi-layer coating process, presenting you high-definition picture quality, effectively improve light transmittance and suppress backlight ghosting and glare. It can capture circular diffuse spots. Reducing the aperture appropriately, you can take photos with a 14-starburst effect. | 🏆【High precision STM stepper motor】This 17mm lens equipped with high speed and high precision STM stepper motor. Cooperate with brand new control circuit, achieve fast, quiet and precise focus. Equipped with a dust-proof and water-proof rubber ring, Gold-plated contacts, supports EXIF information transmission, also has metal bayonet, gold-plated contacts, which can iprove the signal transmission speed of the lens. Improve the corrosion resistance of the lens, making the lens more durable. | 🏆【Compatible with Olympus and Panasonic Camera】Olympus: E-M5 Mark II, E-M5 Mark III, E-M10 Mark III, E-M10 Mark IV, PEN-F, E-PL9, E-PL10; Panasonic: G100, GH5, G9, G95, G85, GX9, GX85, GF-10, GF-9.