Information about Scores
FoCal IQ provides a score for a set of metrics for each camera. Each score is the result of a group of measurements, and is a value between 0 (worst) and 100 (best).
The following sections give a brief explanation of the meaning of each score.
Note: You can quickly jump to the appropriate section from the details pages by clicking on the help icon .
Overall
The overall score is the average of all the other metric scores detailed below.
Calibration
The Calibration score is a combination of the Calibration Requirement and the Calibration Range scores.
Calibration Requirement
Calibration Requirement takes the data from all focus calibration tests performed across all cameras of the same model, and determines how likely it is that a calibration will improve the quality of your photos.
The Calibration Requirement score is based on the typical focus calibration result from all FoCal user tests for the selected camera using lenses of the specified mount. If the camera typically requires no calibration, the score will be close to 100, but if the majority of cameras would benefit from calibration the number will drop towards zero.
Calibration Range
Calibration Range is an indication of the spread of required focus calibration results across the test results for this camera.
The score is determined from a combination of how much calibration the best 50% of cameras typically require and the amount of cameras that would benefit from calibration.
Focus
The Focus score is a combination of the Focus Consistency and Focus Accuracy scores.
Focus Consistency
Focus Consistency is a measure of how repeatable the autofocus system is when the camera is defocused between shots.
The score is determined from a combination of focus repeatability metrics using calibrated phase detect or image sensor measurements, and uncalibrated live view measurements from various tests in FoCal.
Focus Accuracy
Focus Accuracy is a measure of how accurately the focus system of the camera achieves its goal of perfect focus.
The score is determined using the FoCal Lens Model along with Focus Calibration data to determine the offset of each shot in focus adjustment units (e.g. AF Microadjustment or AF Fine-Tune).
Stabilisation
Stabilisation shows the performance of the in-body stabilisation system of the camera split into all lenses, non-stabilised lenses and stabilised lenses.
The score is calculated from the overall stabilisation system performance when handheld (improvement in stops), the average quality improvement when handheld and any degradation to the image quality when tripod mounted.
Dust
Dust shows the susceptibility of the sensor to both dust spots and hot-pixels as measured by FoCal users running the Dust Analysis test.
A combination of the potential hot pixel count, the typical aperture range affected by dust along with the size, number and opacity of the spots is used to build the score.