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# What is Expanded Focus?

When Expanded Focus is enabled, the High-speed Liquid Lens steps through a defined number of planes around a central point on continuous acquisitions to attempt to read insufficiently focused codes, for example, at the limit of focus range. The default configuration allows 3 steps, but it can be set up to 10 steps.

If Expanded Focus is enabled with autofocus and the last distance input provided a distance above or below the search interval, Expanded Focus changes the central reference point for the focus step.

If no distance or height sensor is present, you can use this option to enhance the depth of field at the cost of a slower readout.

Note: DM370,DM280,DM470