Kenko has announced a new version of the 400mm f8 mirror. What is this glass? Which cameras will be available?
Mirror glass is generally considered a curiosity. However, it can not be said that these were bad lenses, which can not be taken pictures. On the contrary – thanks to their design can be great suggestions for amateurs. Why? And can the new version of the Kenko 400mm F8 also be a good proposition? In short – yes, a refreshing version of Kenko may be an interesting option. Why? First and foremost, it is about the dimensions at such a focal length. Thanks to the design in which the mirrors are placed next to the lenses, 400mm has been stuffed in 82mm lengths (112 in the case of mirrors). There is a weight – half a kilogram. Thanks to that, Kenko, like other mirror lenses, is by far the most compact telephoto lens (just look at the 2017's best lenses list to find out). The new focus lens is set at 1.15m , so it's good. Of course the focus will be set manually, which is standard in this type of glass (although there are exceptions, such as the Minolta 500mm f8 Reflex). Filter diameter for Kenko is 67mm. The maximum mapping is 1: 2.5.Worried can only lighten – F8 . But it does not work so that you can not do such a photo stop, but you have to shoot in bright scenery, or raise the ISO. It should be noted that the structure of the mirror lenses does not allow to change the aperture, and the same is true in this case. So we have a fixed F8 that we will not close. Compensation can be a specific but charming bokeh . The new lens will be available in a variety of attachments – Sony A, E, Canon EF and EF-M, Nikon F and 1, Pentax K, Micro 4/3 and Fuji X. Prices are not yet known.