Panasonic's affordable MFT standard prime, the budget alternative to the Olympus 25mm f/1.8.
The Panasonic Lumix G 25mm f/1.7 ASPH. is the most affordable fast prime for Micro Four Thirds, launched around 2016. Providing a 50mm equivalent standard perspective at f/1.7, it serves as the budget nifty fifty for the MFT system. Its low price makes fast-aperture prime photography accessible to everyone.
Optical quality is good with sharp centre performance from f/2.2 and pleasant bokeh. AF is fast and responsive — slightly faster than the Olympus 25mm f/1.8. Build is lightweight plastic at 125g which feels less premium than the Olympus. The aspherical element controls aberrations.
Micro Four Thirds mount only, 46mm filter thread. This directly competes with the Olympus M.Zuiko 25mm f/1.8 which has slightly better build quality but slower AF. The Sigma 30mm f/1.4 DC DN offers a wider aperture in a larger package.
Outstanding value used — often the cheapest fast prime in any mirrorless system. Check AF motor and front element. The choice between this and the Olympus 25mm f/1.8 is marginal. The Panasonic focuses faster; the Olympus feels better built. Both are excellent.