ordered this lens here and use it on my Alpha 7 MKII (no R). What it does is just incredible. I have never owned a lens with such sharpness, detail and color reproduction. At the beginning I bought the camera with the 24-70/4 from Zeiss and I was really happy with it. After that I bought the K&F Concept 85mm 1.4, which I am also very happy with. However, I have to admit that I bought the two K&F Concept lenses in the Canon version and use them with the Commlite adapter, which I bought because I have some Canon lenses from the past. The imaging performance, especially with this wide angle, is simply outstanding and the images are extremely sharp at apertures from 8 to 16 from a distance of approx. 2m to infinity. I initially focused with the red edge enhancement, but found that at this extreme wide angle it's much easier to shoot without focusing. My settings for landscape shots or in the city (buildings etc.) are the following: ISO on Auto, program dial on S (schutter preset) and the shutter speed on 160 or 200, aperture on the lens on 11, the focus ring on the lens between 3m and infinity. Then everything is sharp from 2 meters. It is very important to switch the APS-C sensor adjustment from Auto to OFF in the camera menu. The camera in the standard setting automatically switches the sensor to the APS-C crop as it cannot recognize the lens because there is no electronic communication between the camera and the lens. Without this, you only get an image section that also looks significantly worse in terms of imaging performance and strong achromatic aberrations can occur under certain circumstances. Therefore very important! As many may have noticed, the Sony version is significantly more expensive than the Canon version, so the 70 euros for the Commlite adapter are paid out again, especially if two or more different K&F Concept lenses are purchased, as in my case. The lens is really recommended and a lot of fun!