As Sony expands their full frame mirrorless lineup, the system as a whole becomes more complete, and one of the key pieces of that more encompassing lineup is the first native ultra-wide-angle lens.  In this case, it’s the Carl Zeiss 16-35mm f/4 OSS, which covers a great range in a pro-grade lens for Sony’s E-Mount. The 16-35mm f/4 covers a wide focal range from ultra-wide angle to moderate wide angle, and features an optical stabilizer to aid in hand-holding. The lens isn’t cheapat $1348 US, but promises outstanding optical quality and a top-notch build. In this 16-35mm review, we’ll see whether the Zeiss name holds up to its reputation for optical excellence.