From VFXPedia

Defocus [DFO]
	The Defocus Tool simulates the effects of an out-of focus camera lens, including blooming and image flaring. It provides a fast but relatively inaccurate Gaussian mode, as well as a more realistic but much slower Lens mode.

Contents 1 Defocus [DFO] 1.1 Defocus Controls Tab 1.2 Tips for Defocus (edit)

Defocus Controls Tab

Use this menu to select the exact method applied to create the defocus. Gaussian applies a fairly simplistic effect while Lens mode will create a much more realistic defocus. Lens mode will take significantly longer than Gaussian.

When Lock X/Y is selected, this performs the same amount of defocusing to both the X and Y axis of the image. Deselect to obtain individual control.

The Defocus Size control sets the size of the defocus effect. Higher values blur the image by greater amounts and produce larger blooms.

The Bloom Level control determines the intensity and size of the blooming applied to pixels that are above the bloom threshold.

Pixels with values above the set Bloom Threshold are defocused and have a glow applied (blooming). Pixels below that value are only defocused.

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Tips for Defocus (edit)

EyeonTips:Manual/Tool Reference/Blur/Defocus