Versatile Telephoto Zoom. The OM SYSTEM 40-150mm f/4 ED PRO’s biggest selling point is its zoom range. On a Micro 4/3 body, you’re getting the equivalent of an 80-300 in full frame. The f/4 aperture isn’t exactly supersonic in terms of speed but it remains constant across the range, making it a good choice for still shooters and videographers alike. A rounded seven-blade diaphragm produces smooth, pleasing bokeh.

Advanced Optical Design. This lens’s complex nine-group/fifteen-element design includes two Extra-Low Dispersion elements, two aspherical elements, one Super ED element, and one High-Refractive Index element, all of which work together to produce incredible sharpness, contrast, and color accuracy across the entire zoom range while reducing color fringing, spherical aberrations, and distortions. Each element has a Zuiko Extra-Low Reflection Optical (ZERO) coating to help reduce flare and promote optimal color transmission.

Movie and Still Compatible Autofocus System. The MSC autofocus system and internal-focusing design offer fast, quiet, and precise focusing performance that’s great for stills and video capture. You can use the MF clutch to quickly switch to manual-focus mode for more precision adjustments, and a floating zoom mechanism gives you a 27.6-inch minimum focus distance so you can get in close.

High-Quality Build. Pro-grade means pro build, and that’s what you’re getting here. The dust-, freeze-, and splash-proof barrel keeps you shooting in conditions down to -14° F. A Fluorine coating keeps dust, dirt, rain, snow, and other debris off the front element for easy cleaning.