Key features include: __Retractable Zoom. __ At just under 2" in length when fully retracted, the 35-100mm f/4-5.6 OIS is a great pairing for the Panasonic GM5 as well as other compact Micro 4/3 cameras. __Telephoto Focal Range. __ Providing the equivalent of a 70-200mm focal range after sensor crop, this lens allows you to capture images at a distance. The 70-200mm focal length is popular for sports and portraiture or anything else you’re shooting from a distance. Its variable f/4-5.6 isn’t quite as fast as the Panasonic 35-100mm f/2.8 X OIS, so you’re better suited to stick to daytime shooting with this one. __Supports High Speed Contrast AF. __ The inner focus drive system and stepping motor support the latest generation cameras with sensor drive speeds up to 240 fps, providing fast yet silent performance for both still and video use. __Mega OIS Stabilization. __ The in-lens stabilizer helps minimize camera shake when shooting at slower shutter speeds, producing sharper images with less blur. __Optics. __ One aspherical and two extra-low dispersion elements help to produce images with high contrast and minimal aberrations. Its internal focusing system means the barrel doesn’t extend or rotate when focusing, but do note it has a barrel-extending zoom.