Sony FE PZ 28-135mm F4 G OSS is an Auto Focus (AF) Standard 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 28 - 135mm. With a max aperture of f4 at 28mm, we can not consider this lens fast on wide end but f4 at 135mm is not too bad for tele end.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Sony FE PZ 28-135mm F4 G OSS is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.