Target Distance Tool: AutoFocus Calibration
You can use the Target Distance Tool to suggest a suitable target distance for AFMA / Focus Fine Tune lens calibration with Reikan FoCal.
Note: this functionality is now part of FoCal, scroll down to read about the new feature!
Choose camera, lens focal length and target size:
|Lens Focal Length|
Target Distance Tool Now in FoCal
Starting from FoCal 2.5 the target distance tool is now part of FoCal software.
Users can select a focal length by selecting “Specify focal length” and moving the slider:
When a camera is connected to FoCal the top option is selected by default and FoCal reads the lens information automatically. With zoom lenses both ‘ends’ of the zoom will provide a distance (see also calibrating zoom lenses):
Choose between Feet and Inches or metric via Preferences > Tests:
The document What’s the correct distance to run tests at? contains further useful information and explains why target distance is important and why the distance used does not need to be precisely measured in most cases.