Olympus M.Zuiko Digital ED 25mm F1.2 Pro
The defining characteristic of Olympus and Panasonic's Micro Four Thirds system has always been low size and weight, thanks to the use of a sensor that's slightly more than half the area of the APS-C format, and a quarter that of full frame. But this brings drawbacks with respect to low-light shooting and achieving shallow depth of field. Olympus's response has been to produce three f/1.2 primes in its top-end Pro range, whose ultra-large apertures should go some way to offsetting the smaller sensor size. Here we're looking at the 25mm, which nestles between17mm and 45mm optics in this trio.
Simple optical theory tells us that the Olympus 25mm f/1.2
