I haven't been on a lot recently, but did see Alans post last night and was gonna respond...
I bought my A73 new about 18 months ago from Wilkinsons (who were excellent, BTW). At the same time I bought the 85mm f1.8 lens. Soon after, I had a studio session and noticed that the tight headshots that I took close in (4ft or so) missed focus. I was using AFC (wide) eye AF but they all focussed on the eyelashes rather than the eyeball. Admittedly the plane of focus was really shallow at that distance, but I was expecting better. Having said that, I was using f7.1 or thereabouts, so I would have expected some latitude.
The next weekend, I took my FIL to a vintage truck and car show. I took a few snaps to kill the time and I took a couple of a logo on the front of a truck on an angle. I focussed right on the centre of the badge. When I got the pictures into Lightroom, I noticed that they were all front focussed! So, I got the tape measure out and also did the old batteries test, and true enough, the results all showed front focussing.
I contacted Wilkinsons and told them what was happening and sent them the pictures that I had taken showing the issue. It was agreed to send the camera in to them for testing. They concluded that there was indeed a front focussing issue and ordered me another camera body. After a wait of a few weeks (the cameras were in very short supply at that stage) a new camera body was delivered. I immediately put the 85mm lens on and did some ruler and battery tests... GUESS WHAT? ... Still front focussing! … Hmmmm … maybe it was the lens!
So, I got back onto Wilkinsons and they suggested that I send both the camera and the lens into them for testing. I did this and they took some standard portraits of the staff around the office. They also had a Sony rep visiting one of their stores for an open day and took the combo to him to have a look at. They all agreed that there wasn't an issue. They sent me the staff pictures and they looked OK, however, they were taken at high ISO's (3200 and one at 6400, IIRC). So, they sent the camera and lens back to me. Wilkinsons said that if I was still unhappy, that the Sony rep was doing an open day at the Belfast Calumet store a week later and I could pop in and see him there and talk it through. I did this and he remembered testing the camera at Wilkinsons. He took a few snaps and concluded once again that the camera and lens were fine! He told me not to go by ruler or battery tests.
Now, I was conscious that none of the testing that they did seemed to be under the same conditions/situations that my pictures were taken. I was still not happy with the outcome, but I didn't feel that I could take it any further and reluctantly agreed to accept the situation.
I did another portrait session with the combo about 3 months later, and the pictures were fine, with the focus exactly on the eyes as planned for about 95% of the shots!!! The combo has continued to be accurate since ... although I haven't done any more ruler or battery testing!
Here's a 1 to 1 crop of a snap from a few weeks ago....
eye by
CFC Photo, on Flickr