What is FoCal?
FoCal is a utility which helps calibrate the Autofocus adjustment value of your camera and lens combination quickly at the touch of a button!
Why use FoCal?
Modern DSLR cameras have a setting – provided by the camera manufacturers – which allows you to adjust how the camera and lens work together to get the best performance. The manufacturers give you this setting in an admission that manufacturing tolerances and day-to-day usage of a camera can affect the performance of the autofocus.
The setting is just a number… but how do you pick it? There are many different interacting components of the AF system, and you can’t reliably pick the correct value without checking and rechecking your settings.
And here’s where FoCal comes into the picture – it takes all the guesswork out of the calibration. It shoots, validates, analyses, checks, adjusts… all this complexity is hidden away (unless you choose to see it), so it’s just a simple operation to get the best from your camera and lenses. Check out this page with a simple description of how DSLR autofocus systems work, and why they need adjusting
How do I use FoCal?
FoCal is computer software you install on a PC or Mac, and a special target which you print out and attach to a wall. To use, you connect your camera to the PC with the stadard USB cable and start the software.
FoCal guides you through the correct positioning of the camera with on screen Live View assistance, then you can run any of the tests at the touch of a button.
FoCal works with Canon and Nikon DSLR cameras that support AF Microadjustment/Fine Tune – see the Supported Cameras page for more details.
FoCal Plus or FoCal Pro?
FoCal comes in 2 different versions: