Mamiya Sekor 55mm f/1.8

The lens has 6 elements in 4 groups, which is a standard design for a prime lens. It has a multi-coating to reduce lens flare and ghosting. The lens was manufactured in the 1970s and 1980s, so it is a vintage lens. The aperture ranges from f/1.8 to f/16, which allows for a wide range of depth of field. The build quality is good, with a metal construction and a smooth focus ring. The lens has a resolution that is sharp enough for everyday use. The bokeh, or the quality of out-of-focus areas, is smooth and pleasing to the eye. The lens is a manual focus lens, which may require some practice to get used to. There are alternatives to this lens, such as other vintage lenses or modern lenses from different manufacturers. Overall, the Mamiya Sekor 55mm f/1.8 is a good option for those looking for a vintage prime lens with good optics and a pleasing bokeh.

Optical design

Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle. Wide open, subjects located outside the depth of field are shown very blurred.

Physical characteristics

Weights 202 grams so consider putting to your camera bag. 46 mm long, this small lens should be always in the camera bag. With a lens filter diameter of 52 mm commonly filter size, provides a range of filter options.