The Sony E mount 100mm f/2.8 ED UMC Macro Lens from Samyang is a manual focus short telephoto designed for working with subjects both near and far. This 100mm f/2.8 lens features a Sony E mount and is compatible with full-frame sensors or APS-C sensors, where it will provide a 150mm equivalent focal length. A bright f/2.8 maximum aperture is useful for working in a variety of lighting conditions and the minimum f/32 aperture helps to attain a long depth of field when working with close-up subjects. The optical design incorporates one high refractive index element and one extra-low dispersion element to reduce chromatic aberrations and distortions throughout the focusing range, and an Ultra Multi-Coating has also been applied to minimize flare and ghosting for increase contrast and color neutrality. Featuring a macro design, this lens affords a 1:1 maximum magnification ratio along with a minimum focusing distance of 1'. Its rounded nine-blade diaphragm contributes to a pleasing out-of-focus quality when using selective focus or shallow depth of field techniques. It benefits working with especially close subjects, this manual focus lens features an internal focus design to maintain the overall lens length during use. Additionally, the front filter mount does not rotate when focusing to better enable the use of polarizers, graduated ND, and other filter types that require precise positioning.