TTArtisan AF 17mm f/1.8 Air: $150 Wide Prime for APS-C

A fast, autofocus 17mm prime for under $150 is genuinely useful territory — Fujifilm X and Sony E shooters who want a pocketable wide-angle without the Fujicron price tag now have a serious option to consider. The real question is whether TTArtisan's AF implementation holds up on moving subjects; their recent autofocus lenses have been hit-or-miss, so treat this as compelling for street and travel but not for anything that needs reliable tracking.