f/8.0 Mirror Lens from Kenko may
sound like it is just another super telephoto lens, but unlike most
others it is just over three inches long and weighs less than a pound.
This makes it far more convenient to use in fast-paced scenes--such as
birding, wildlife, or sports--because it does not require a cumbersome
tripod to hold it up.
However, like other super telephoto lenses, it is still recommended that
you either brace the camera, increase the ISO sensitivity, or turn up
the shutter speed in order to prevent "camera shake" that still affects
these long focal length lenses. If you simply remember to treat this
compact and lightweight lens like the much larger and heavier
competitors, this lens can be much easier to carry around and use for
extended periods of time, while still getting the outstanding zoom and
performance of a super telephoto lens.