A7R3 + Tokina 10-17 ? in Photography Gear and Technique Posted Saturday at 07:11 PM Regarding the Tokina 10-17 zoom you are making the assumption that the lens will work with the A7R III and an adapter. If you look at the front page of divephotoguide.com you will see that the 10-17 is having compatibility issues with the Nikon Z6/7 cameras, I would want to know it will work before I would buy. Second is that the A7R III in APS-C provides about a 19mp image rather than the 24mp common with most current APS-C camera bodies. The Sigma is an option that has been tested but I think the most popular combo is the Canon 8-15 with the Metabones adapter. It is the most expensive option but is a bit like having two different lenses. At 15mm it is a full frame fisheye and at 8mm it is a circular fisheye. Not everyone likes the 8mm round image but I have found it fun to use. The port selections remain about the same as long as you buy a port with removable shade. The shade blocks the corners of the 8mm causing bad vignetting. Images with the Canon 8-15 and A7R II/III.