Olympus's compact standard prime for MFT, providing a 50mm equivalent at f/1.8.
The Olympus M.Zuiko Digital ED 25mm f/1.8 is a compact standard prime for Micro Four Thirds, launched around 2014. Providing a 50mm equivalent perspective at f/1.8, it serves as the nifty fifty for the MFT system — a compact, affordable fast prime for everyday photography and portraits.
Optical quality is good with sharp centre performance from wide open and pleasant bokeh. ED glass controls chromatic aberration. Build is mostly metal with a quality feel despite the compact dimensions. Autofocus via the body's contrast-detect system is adequate for general use.
Micro Four Thirds mount only, 46mm filter thread. The Panasonic Lumix G 25mm f/1.7 ASPH. is a very similar alternative, often cheaper, with slightly faster AF. The Sigma 30mm f/1.4 DC DN offers a wider aperture in a larger package. The Olympus 25mm f/1.2 PRO is the premium option.
Good value used. Check AF accuracy and front element condition. The choice between this and the Panasonic 25mm f/1.7 is marginal — both are excellent budget standard primes for MFT. The Olympus has slightly better build quality; the Panasonic focuses slightly faster.