Yongnuo has announced the YN50mm F1.8S DA DSM, it’s newest autofocus ‘nifty/thrifty fifty’ lens for Sony E-mount APS-C camera systems.

Yongnuo currently offers 50mm F1.8 lenses for both Canon EF-mount and Nikon F-mount, but this new ‘nifty fifty’ is designed specifically for use with Sony’s a6000 series mirrorless cameras.
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https://www.dpreview.com/news/8958425778/yongnuo-announces-new-50mm-f1-8-nifty-fifty-autofocus-lens-for-aps-c-e-mount-cameras