After months of saving money for this lens, I’m finally a lucky owner of the Panasonic Leica 100-400mm f4-6.3 lens. I mainly use this lens for what it is supposed to be, a wildlife and bird photography lens. I’m not leaving my room without this lens.
This lens was released by Panasonic in April of 2016. It is offering an astonishing 200-800mm equivalent field of view in a small package (985g).
This lens uses a variable aperture, which increases, as you increase the focal length: