Sony camera owners searching for a small, light lens should take a close look at the E 20mm F2.8 ($349.99). It's an ultra-slim prime and captures a moderate wide-angle view when paired with an APS-C sensor camera like the a6400. It's a much better performer than the older 16mm F2.8, and one of our favorite lenses for the Sony system in general, earning our Editors' Choice. Ultra-Slim The E 20mm F2.8 measures just 0.8 by 2.5 inches (HD), so it barely juts out from your camera. Sony includes a compact plastic lens hood; it adds about half an inch to the height, and matches the barrel's diameter. You'll need to remove the hood to add a filter—the thread supports the 49mm thread size, which is used by many of Sony's APS-C lenses. There is no dust or splash protection, which is a feature Sony has reserved for its full-frame lenses to date. Similar Products Sony E 16mm F2.8 $249.24 See It at Amazon Read Sony E 16mm F2.8 Review Sig...
The E 20mm F2.8 is the ideal wide-angle pancake lens for your Sony mirrorless camera.
Slim and light; Sharp optics; Wide field of view; Works with fisheye and wide angle converters; Relatively affordable
Some barrel distortion; No stabilization; Omits dust and splash protection