The Sony 50mm f1.8 lens is pretty nice so far. It focuses quickly, feels fair for the $250 price, and is pretty simple to use.
Sony 50mm f/1.2 GM Review They Said It Couldn't Be Done!
TTartisan 50mm f1.4 first impressions - Frank Doorhof
Sony FE 50mm f1.8 review
YONGNUO YN50mm F1.8S Lens, 50mm F1.8 Larege Aperture, APS-C Standard Prime E-Mount, Auto Manual Focus AF MF USB for Sony Cameras Black : Electronics
Review: Sony FE 1.8/50 (SEL50F18F)
Sony FE 50mm F1.8 Lens Review
First Impressions–Sony 35mm f/1.8 OSS
Sony FE 50mm F1.4 GM review - Amateur Photographer
Sony FE 50mm F1.2 G Master Review