Panasonic Lumix G 20mm F1.7 ASPH
The 20mm F1.7 is an excellent lens, especially considering its tiny size. It does well in all aspects of our studio tests, and produces fine images in a wide range of situations while also focusing quickly, silently and decisively. On compact Micro Four Thirds bodies it offers impressive image quality and low-light capability in a package significantly smaller and more discreet than any DSLR system.
Everyday use on compact Micro Four Thirds bodies, where is small size and excellent optical performance make an appealing package
It's not the most versatile lens in the world, but overall there's little to criticize.