DxOmark (Click here) posted the Tamron 150-600mm lens test. They used the C-mount version but as you know there is an A-mount version too (prerder here at BHphoto). DxO confirms that this is the best superzoom they have tested to date:

If Tamron built this lens to outperform the Sigma offering then they succeeded with full frame cameras. The gain in performance over their rival’s offering is less noticeable on the APS-C cameras. Despite that, the image quality is a slight improvement over the Sigma. Given the longer range and similar price, it’s a pretty impressive achievement. 

The Tamron even outperforms the pricier Canon lens on the full frame Canon EOS 5D Mk III though it’s less convincing when compared with the Canon EOS 7D. There’s likely too little in it to switch but for first-time buyers the new Tamron is attractive proposition.

Great lens!

SLRgear tested the Zeiss 35mm FE lens and writes:

Optically, this lens is a stellar performer, as many Zeiss lenses are, with very sharp images on both the new full-frame cameras as well as sub-frame Sony cameras. Other factors like chromatic aberration and distortion are practically nonexistent with this lens, but there is some vignetting and a minor amount of corner softness, particularly on full-frame cameras at wider apertures — a pretty small price to pay for outstanding performance otherwise.

Carl Zeiss Vario-Tessar E 16-70mm f/4 ZA OSS T* Review at ePhotozine.
Sony E 18-55mm f/3.5-5.6 OSS Lens Review at ePhotozine.
Zeiss 55mm lens tested at SonyAlphaLab.
Sony FE 55mm F1.8 ZA Carl Zeiss Sonnar T* Lens – First Impressions at Soundimagesplus.

P.S.: SLRgear title via Imaging Resources partner site.

Zeiss 35mm at Amazon, Adorama, BHphoto, SonystoreUS. Sony DE, UK, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT,
Zeiss 55mm at Amazon, Adorama, BHphoto, SonystoreUS. Sony DE, UK, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT