Overall, the Viltrox AF 135mm F/1.8 FE LAB is a good alternative to the much more expensive Sony FE 135mm F/1.8 GM which costs $2099. It is not a perfect lens but offers great value for photographers ...
and telephoto zoom, and prime focal lengths. The company lists about 30 lenses on its site, all using the Micro Four Thirds mount. As with its bodies, Sony's lenses can be surprisingly light.