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I've been using this lens on my A7R II for around 2 Months now and I have to say, that I'm totally satisfied with it. The AF is quite quick and accurate on the Commlite EF to Sony adapter. AF-C works really nice in photo mode and okay in video. But in AF-C the HSM motor is a bit noisy. Sometimes the lens is not recognized by the camera. I don't know if that's a problem of the lens or the adapter. This happens around every 3rd time I turn it on. Maybe the Metabones adapter will do a better job, but I haven't tested that yet. Anyway, the 20mm f1.4 Art is a pretty amazing lens for landscapes, astrophotography, architecture and even people! It is always sharp in the center, and has a good sharpness in the corners at f2.8. There are nearly no flares, chromatic aberrations are acceptable for this focal length and the Bokeh is super-smooth! I can recommend this lens to all A7 II and A6300 users! But maybe it will perform a bit better with the Metabones adapter. Here is how the lens looks on the A7R II: http://imgur.com/Cc3hHyw And here are a few sample Images:

Sigma is introducing two new wide-angle fixed focal lengths for full-frame cameras (L-mount and Sony E-mount), the SIGMA 20mm F1.4 DG DN and SIGMA 24mm F1.4 DG DN. Both lenses will be launched by end of August and will cost $ 899 / (SIGMA 20mm F1.4 DG DN) and $ 799 (SIGMA 24mm F1.4 DG DN). Both lenses are available for pre-order at B&H: SIGMA 20mm F1.4 DG DN @ B&H SIGMA 24mm F1.4 DG DN @ B&H For both lenses, Sigma emphasizes that are suitable for astrophotography. Product Images SIGMA 20mm F1.4 DG DN Product Images SIGMA 24mm F1.4 DG DN SIGMA 20mm F1.4 DG DN / SIGMA 24mm F1.4 DG DN at a glance Lens construction 17 elements in 15 groups, with 2 SLD, 3 aspherical lens elements (Sigma 20mm) 17 elements in 14 groups, with 2 FLD, 1 SLD, 4 aspherical lens elements (Sigma 24mm) Inner focus system Compatible with high-speed autofocus Stepping Motor Front filter thread 72mm (Sigma 24mm) / 72mm (Sigma 20mm) Compatible with Lens Aberration Correction Function available on supported cameras only. Available corrections and auto correction functionality may vary depending on the camera model. On cameras where lens aberration correction is controlled with “ON” or “OFF” in the camera menu, please set all aberration correction functions to “ON” (AUTO). Support for DMF and AF+MF Compatible with AF assist (Sony E-mount only) Nano porous coating Super Multi-Layer Coating Water- and oil-repellent coating Aperture ring Aperture ring click switch Aperture ring lock switch AFL button Programmable function only on compatible cameras. Available functions may vary depending on the camera used. Manual Focus Lock (MFL) switch Rear filter holder Focus mode switch Support for switching between linear and non-linear focus ring settings (L-Mount only) Petal-type lens hood with lock (LH782-01) Dust- and splash-resistant structure Compatible with SIGMA USB DOCK UD-11 (sold separately, L-Mount only) Designed to minimize flare and ghosting Every single lens is evaluated with SIGMA’s proprietary MTF measuring system 11-blade rounded diaphragm High-precision, durable brass bayonet mount “Made in Japan” craftsmanship

Ever since I had decided a while back that I was just going to shoot Fuji and Sony, I made the move to dump most of my Canon stuff (which was a pretty extensive collection). I successfully dumped about 12 lenses once I realized the A7R2 was the real deal and that it would work for me. Since then, I have bought the 28/2 and the 35/1.4 FE lenses. The 28 is compact, and renders nicely enough that it comes in very handy. The 35 was an inconsistent dog which was returned after a week of frustration (magical at the one thing it did well though which was centered subjects at close distances wide open). Since returning the 35, I have gone into a mode where I'm furiously looking for glass to put in front of this amazing sensor. I came to the point this morning where upon receiving my most recent purchase (Sigma 20mm 1.4 Art) that I have no completely bought back into a Canon glass system. I have since rebought (and resold) the 50L, rebought 85L2, Sigma 20mm and 50mm Art, and the Canon 200mm F2.0 IS all within the last two months. Adapting glass is not a perfect solution which is why I was hoping to buy into Sony completely. But seeing as my first experience with one of their expensive primes was complete shite, I was pushed back in the other direction to look for a fix for right meow. By my estimates, I've spent over 8k on Canon EF mount lenses recently while no longer owning a Canon EF mount body. This, to me is indicative of a major issue with Sony's ability to produce a line of impressive, consistent, and alluring lenses at comparable/acceptable prices. If they did have a solid line of lenses that I could trust, the cheese I just spent would all be in Sony's pocket already. I have owned a multitude of lenses in a multitude of different systems and the FE 35/1.4 was the first lens I've ever gotten that exhibited a blaring problem immediately upon mounting and shooting. This, combined with the subsequent reading I have done from lensrentals etc do not instill the confidence necessary for me to feel comfortable sending 1-3k to Sony for any lens right now. Go ahead and flame me if you want. But know that I would love for Sony to succeed and become a true contender as I have appreciated every bit of their innovation these past few years. Rant over. lol.

Sony alpha 900. Sony 20 f/2.8. Comments are welcome ;-) Greetings from David