http://www.fujifilm.com/products/digital_cameras/xf_lens/roadmap/   To begin with. Anyone here has something to tell on 23mm f/1.4 vs faster AF f/2 WR models but at video end? https://www.youtube.com/watch?v=dIBVrApLrNQ "I tested this (23mm f/1.4) in the shop on the X-E3. The AF was disappointingly slow and imo not usable in cases where you want to shoot moving objects like playing children eg.. I compared with the 23 mm f2 and that was snap fast! Would have liked the 1.4 tho