Kennex 400mm f/6.3

It is a camera glass that can capture distant subjects in high resolution. The lens has a total of 4 glass elements that are coated to reduce glare and improve image quality. The aperture of the lens is f/6.3, which is relatively narrow and may require a slower shutter speed or higher ISO in low light conditions. The build quality of the lens is good, and it is durable enough to withstand regular use. The lens produces a pleasing bokeh effect, which is the quality of the out-of-focus areas in an image. The lens does not have autofocus, so it requires manual focus, which can be challenging for some photographers. The manufacturing time of the lens is not specified, but it is likely to take several months to produce. There are alternatives to this lens, such as other ultra telephoto lenses from different manufacturers. Overall, the Kennex 400mm f/6.3 is a high-quality photographic lens that can produce sharp and detailed images of distant subjects.