This HandeVision IBELUX 40mm f/0.85 Lens is specifically designed for Micro Four Thirds mount mirrorless digital cameras, where it provides a 35mm-equivalent focal length of 80mm. This manual focus prime lens is characterized by its exceptionally fast f/0.85 maximum aperture, which enables its use in a wide array of lighting conditions as well as provides extensive control over focus placement. The optical construction is comprised of 10 elements in 8 groups, including a concave front element that helps to reduce chromatic aberrations and maintains a central angle of incidence of 2.6° for sharp imaging and minimal distortion throughout the aperture range. The physical construction of the lens is set in an all-metal lens barrel, in which anodized aluminum alloy, brass, and stainless steel are used. The manual focus ring rotates 250° to enable precise focus setting to distances as close as 2.5'. Additionally, a 10-blade diaphragm works to produce a circular aperture that contributes to an aesthetic out-of-focus quality to benefit selective focus and shallow depth of field techniques.