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As has been reported lately, the A7RII with the new 50mm, the 85mm and the GM lenses, plus at least the 55mm F/1.8 with firmware version 2 on an A7RII (and others it seems) body stops the aperture down before focusing in AF-C mode. This is a huge issue since it makes it impossible to use AF-C in (for example) dim light studio situations. For serious studio work this means that the A7RII with GM lenses and the others mentioned, has less value than a paper weight. Yesterday night and this morning, I tried this again. I tested my A6300 with the kit lens and the A7RII with the 55mm. The results are depressing. A7RII with 55mm At F/3.5 I was able to use PDAF focus but at F/4 PDAF was not kicking in at all and the CDAF was hunting. A6300 with 16-50 kit Found focus using PDAF at any aperture setting. This is such a serious issue that I am considering going back to Canon. Some Canon glass will stop down to F/2.8 while using AF-C, but not to F/4 or /8 as Sony does.