When I first moved from Canon DSLRs to Sony Mirrorless cameras, I often adapted my Canon lenses using a metabones adapter. Mainly because back then the seelction of good E-Mount 'Full Frame' lenses were small. But over time Sony continues to expand their line of full frame e-mount lenses and with Sony's excellent auto focus system, you just can't beat working with native lenses. One of my favorite lenses is the 16-35mm but at F/4 it wasn't the greatest. Now Sony has just announced a new 16-35mm F/2.8 GM (G Master) version and this is definitely a lens to add to your kit if you're working with Sony E-Mount full frame cameras like the A7s / A7sII. Just in case you want something event wider for e-mount Full Frame, they've also dropped a new 12-24mm. Check out both of Sony's new lenses (here).