Just announced: New Yongnuo 23mm f/1.4 DA DSM WL APS-C E-mount lens
Yongnuo announced this new APS-C E-mount lens that will be available soon on their Amazon page.
SonyAlphaBlog tested the lens and concluded:
The Yongnuo 23mm F1.4 DA DSM WL (268 euros) is a very good lens overall : very good ergonomics (including a wireless remote) very good AF , build quality , very good centre sharpness, color rendering, nice bokeh wide open
The improvements are related to level of CA, corners sharpness and bokeh as of F2
Alternatives: If you want the best 23mm in term of sharpness then the Sigma 23mm F1.4 DC DN (499 euros) offers excellent sharpness results on the entire field
Two youtube reviews: