With the release of the EOS 5D Mark III back in 2012, Canon enabled Wide and Telephoto Calibration for zoom lenses. Watch a full overview of FoCal Pro running an automated calibration at YouTube: FoCal 'Hands Free Mode' Calibration Wide/Tele Zoom CalibrationĪ single calibration will produce a focus adjustment result that is useful for a single focal length of a lens. Once a FoCal calibration is running the user does not need to input any values and FoCal runs 'Hands Free'.

The difference with this mode is that FoCal is also able to automatically change the AF Micro Adjustment / AF Fine Tune setting. This mode works in a very similar way to User Assisted Mode, with FoCal able to make settings changes on the camera automatically. Watch a full overview of FoCal Pro running an automated calibration at YouTube: FoCal 'User Assisted Mode' Calibration Hands Free Mode In the shorter term we've worked on making the 'user assisted' part of the process easier, fewer AF Fine Tune steps required and 'Voice Prompt' along with the camera HotKey mean the process is very quick and simple. We continue to try to get the camera manufacturers to add this software functionality and we've got some ideas on how to go about this so it's not a done deal(!). During the calibration process, a number of AF Fine Tune changes need to be set on the camera and they have to be input by the user as directed by FoCal (so it's 'user assisted' in that sense). Other things, like setting mirror lockup and de-focusing between each shot, analysis of each image for sharpness/detail and graphs to determine the best AF calibration value work automatically. What this means is that FoCal still provides its full automated calibration, determining which and how many AF Fine Tune points are needed for the calibration result.

The features that can be controlled are dictated by the camera manufacturer, they expose the ability to adjust certain settings through a documented interface which FoCal uses to make all the necessary automated adjustments to the camera. Software control of the AF Micro Adjustment (or AF Fine Tune) setting on certain cameras (designated as 'User Assisted') is not possible from a computer. A series of proprietary image processing and predictive statistical algorithms mean that FoCal is able to calculate the best AF calibration for a particular lens accurately and easily, with minimal input from the user. Using this connection it is able to operate the camera remotely, driving it to capture test images, download those images and analyse them for sharpness to determine the best AF calibration value for each lens. FoCal runs on your computer and connects to the camera using a USB cable (supplied in the box with new cameras).

Reikan focal pro 2.65