typical Planar fifty dollars, pleases with the picture at all apertures, very sharp starting somewhere from f / 2.2, stable result in most shooting conditions, the design is convenient when removing / putting on the carcass, do not hook the control and the front lens, if you wind the filter, then a very good option for shooting in rainy / foggy weather + a bayonet skirt will save you from water. autofocus speed is highly dependent on the camera, the older the faster
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