【Feature】Lightweight body combined with F1.7 large aperture, you can easily achieve a soft and beautiful blur effect, M43 Frame, Auto and Manual Focus, with 10 optical lenses in 9 groups structure design and nano multi-layer coating process, 7pcs aperture blades, F1.7-F22 Aperture, Stepper Motor drive system, 52mm Filter diameter, φ65.8×77.8mm Maximum diameter and length，0.15x Maximum magnification, 0.18m minimum focusing distance | 【Compatible】Work with M43 Mount Cameras: Panasonic GH5 G9 G95 G85 GX85 GF-9 GF-8 GX9 GF10, Olympus E-M5 Mark II E-M10 markIII E-PL9 PEN-F | 【Structure】This 17MM F1.7 lens mount is equipped with a dust-proof and water-proof rubber ring，which can effectively resist the entry of dust and water droplets. Metal bayonet, gold-plated contacts, supports EXIF information transmission, equipped with 52mm lotus-shaped lens hood | 【Focus Ring】 Focus ring supports full-time manual focus, After completing auto-focus, you can directly manually adjust the focus position without switching the focus mode to achieve the focus effect you want. ( Note: The full-time manual focus function can only be used normally after enabling the corresponding settings on the camera. For detailed operations, please refer to the camera manual | 【Function】Equipped with 2 aspherical lenses to effectively compensate for various aberrations, equipped with 2 low dispersion lenses，which can better suppress the dispersion problem caused by wide angles