Once you’ve dialed-in the focus you can change the settings manually on the camera, preview and refine as needed. After you’ve gotten everything lined up you’ll be able to preview a close-up live view of the target center as you adjust the focus.
Once you’ve opened the FoCal app and connected the camera the software will help get your camera in the right position, detecting pitch, roll, and elevation deviations that might impact the test results. Once you’ve done that you will set your camera up on a tripod parallel to the target and connect it to your computer via USB. To use FoCal you’ll have to print out a QR-code-looking target and hang it on your wall. This is why I decided to invest the $35 into buying a copy of FoCal Standard semi-automated focus calibration software. You could always shoot tethered to LR to view your adjustments in real-time but that has its own issues. While there are manual options to AF micro adjust, they can be tough to interpret when you’re making decisions based upon the sharpness of a picture on the back screen. Immediately though, I noticed a lot of my images were grabbing focus on eyelashes rather than the eye itself, leaving the eyes slightly OOF. While I typically shot portraits at either f/2 and f/2.5 I figured buying a 1.4 and not shooting it wide open was like buying a Ferrari and only driving it to and from Starbucks. About a month back, I traded in my trusty 85mm f/1.8 for the Nikon flagship portrait lens, the 85 f1.4G.
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