Originally posted by fulcrumx29 Well, I believe the chart since I saw real world difference. For example, the focus error will be magnified when shooting distantly. At I observe from the chart, my FA50/1.4 FF on apertures larger than 2.8 and RF otherwise. When I shoot a tree about 200 m to me, f2.8 can get way sharper image than f2. Maybe you will argue the DOF thing but I really believe you should get sharp image with f2 if focus is right. And I can see a tree leaf nearer is clear on the f2 shot which means a front focus in real life.
Here are the pictures:
This is exactly the observation I made earlier, where you have a busy focus field, and the AF will focus on whatever it locks on.
Nothing to do with FF or BF. In fact, you should be happy the focus showing here is pretty sharp - on the object the AF locked in on.
The FA50 f/1.4 is a very sharp lens, if you learn to work with its quirks.
Sorry, all I can say is learn to work with your gear, instead of assuming it is busted.
Of course, sometimes the camera or lens really is faulty, but this one doesn't look like it.