Fujinon MK 50-135mm T2.9 is a Manual Focus (MF) Telephoto Zoom lens with 35mm FF max sensor coverage. When mounted on a 35mm FF sensor camera, it will give you an FF equivalent focal range of 50 - 135mm. With a max aperture of f2.8, this lens is fast on wide end and equally fast at 135mm with a max aperture of f2.8.
Fujinon MK 50-135mm T2.9 is not a weather sealed lens, so you have to be extra careful against rain and dust.