The Focal Length Calculator is used to determine the lens size required to see a certain size object from a distance.
Using the Calculator
- Select the Image Sensor Size (CCD)
- Enter the Distance to the object
- Enter the Width/Height of the object you want to monitor.
- Click "Calculate" - A summary will be displayed to explain the results
IMPORTANT: These calculators are to be used as a guide ONLY and not relied on for critical monitoring applications.