M.Zuiko ED 45mm f1.2 PRO at a Glance. We’ve designed the M.Zuiko 45mm F1.2 PRO (90mm 35mm equivalent) with one goal in mind: to make your sharpest, most beautiful portraits effortless. You’ll shoot wide open at f1.2 and capture tack sharp subjects and smooth feathered bokeh with a depictive three dimensional result. We’ve included autofocus that’s fast and accurate, even at f1.2. Our most advanced lens coating virtually eliminates flares. And with splashproof and dustproof metal construction, a compact lightweight design, and our brightest aperture for superior low-light performance, this ultimate portrait prime will be one of your go-to lenses in every shooting environment. High Performance. M.Zuiko PRO lenses are built for the highest level of performance, incorporating fast apertures and weathersealed construction. Sharp At F1.2. This advanced F1.2 PRO lens combines ultra shallow depth of field and ultra high resolution at the maximum f1.2 aperture setting. Feathered Bokeh. Beautiful background bokeh is a must for perfect portraits. To give you complete creative control, the 45mm F1.2 PRO provides two types of bokeh effects. Fast & Accurate AF. One of the keys to beautiful sharp portraits is focus. Some fast prime lenses compromise AF speed by using a large focusing mechanism with multiple elements.