F1.7 large aperture, which easily blurs the background.
AF/MF and supports full-time manual focus.
STM stepping motor makes focus more accurately and smoothly.
Lens structure: 8 groups of 9 pieces, including two ED ultra-low dispersion lenses.
The minimum focusing distance is only about 0.3m, and the maximum magnification is 0.15 times.
A review of the Yongnuo 42.5mm f/1.7 MFT lens can be found here.