Collect a ton of lightThe Kamlan 50mm f/1.1 manual focus lens is designed for the mirrorless camera, with sensors as big as APS-C, which delivers top grade image quality, regardless of weak lighting conditions. This lens provides a bright F1.1 aperture at fixed focal lengths 50mm, equivalent to 135 full frame is 75mm( at APS-C), 100mm ( at M4/3). The extremely shallow depth of field at open aperture produces portraits and detailed studies of unequaled aesthetic effect. It also provides outstanding fast and accurate shutter speed by achieving a great amount of light.Nice sharpness even when wide open at f1.1Because of the 12 circular aperture blades, it has buttery smooth bokeh and extremely shallow depth. The lens also manages to keep some nice sharpness even when wide open at f1.1. When at f1.1 with portraits and it's very doableKamLan 50mm f/1.1 Manual Focus Lens for Fujifilm X Mount FeaturesVersatile - Great street shooting lens, not too wide, not too long. On a APS-C sensor (any non-full frame camera body) it is also a great portrait lens, just long enough to remove distortion from your subject's face and flatter them a bit more, not so long you need to stand across the street.Fascinating Blur - Amazing maximum aperture of F1.1, which creates fascinating background blur effect and sharper image quality, even in weak lighting conditionsGreat for Travelling - Because it's light weight, and is a fast lens (big aperture f/1.1) the 50mm is a great addition to your bag for trips. It weighs practically nothing, you don't even know it's in therePremium Optical Design - 12 circular aperture blades, 5 groups of 5 elements lens structure with high quality multi-coated optical glass, ensures low image distortion, excellent image sharpness and great contrast. 50mm focal length is equivalent to 75mm on APS-C camera. Perfect for portraits shooting with fascinating background blur effect