Sigma Mirror 400mm f/5.6

The Sigma Mirror 400mm f/5.6 is a camera glass that provides a long focal length for capturing distant subjects. It has a manual focus system, which means that the photographer has to adjust the focus manually. The lens has a unique mirror design that reduces its size and weight, making it a good alternative to traditional telephoto lenses. The bokeh, or the quality of the out-of-focus areas, is subjective but can be pleasing. The lens has a fixed aperture of f/5.6, which limits its versatility in different lighting conditions. The lens elements are coated to reduce flare and ghosting, which can improve the image quality. The build quality is good, and the lens is durable enough to withstand regular use. The resolution, or the amount of detail captured by the lens, is decent but not exceptional. The manufacturing time for this lens is not specified.

Optical design

Not the best in low light conditions but the lack of high aperture can be compensated with higher iso

Physical characteristics

111 mm long, requires consideration if you want to carry in the camera bag. Weights 1050 grams so it is a heavy lens, consider using its own lens bag. With a lens filter diameter of 86 mm finding lens filters in this range can be expensive consider using Cokin P system if you really need one.