The M.Zuiko Digital ED 90mm f/3.5 Macro IS PRO, from OM SYSTEM, is the ideal field macro lens for Micro Four Thirds shooters. This telephoto prime mixes a 180mm-equivalent focal length with a 2:1 maximum magnification for close-up shooting at a greater-than-life-size scale. A minimum focusing distance of 8.8" translates to a minimum working distance of about 3.5" from the front of the lens. The floating focus design maintains sharpness throughout the focusing range, offering matched image quality from the minimum focusing distance up to infinity. When used with the optional MC-14 or MC-20 Teleconverter, the effective maximum magnification can be increased to 2.8x or 4x, respectively. The optical design has been optimized to suppress chromatic aberrations and color fringing at close range for more realistic and detailed rendering.  ZERO (Zuiko Extra-low Reflection Optical) coating suppresses flare and ghosting for greater contrast and color fidelity when working in strong lighting conditions. AF is supported at the closest focusing distances and can be used in conjunction with Focus Stacking functions that automatically move the focus position in between exposures. Internal focusing design, which uses two focusing lens groups, maintains the overall lens length during use for greater usability at close range and for more responsive focusing action. When used in conjunction with cameras featuring in-body image stabilization, Sync IS utilizes both lens and camera-based stabilization systems and corrects for up to 7 stops of camera shake across 5 axes. IP53-rated weather sealing guards against dust and splashes, as well as temperatures down to 14°F, for confident use in harsh weather conditions. 

The front element features a protective fluorine coating that repels moisture, dirt, and oils and is easier to clean than an uncoated surface. The l-Fn button is featured on the side of the lens for making lens-based settings adjustments. Despite being a 180mm-equivalent telephoto lens, this lens sports a relatively sleek and lightweight design, measuring just 5.4" long and weighing 1 lb.