What is a Diffuser ?
A flash diffuser is a simple light modifier that attaches to the upper part of an external flash unit. It’s used to soften or spread the harsh, concentrated light that bursts out of the flash, creating a more even and flattering light on the subject. It also helps remove heavy shadows created by the harshness of the strong lighting.
What is a Soft Focus Filter ?
Creates an effect similar to duplicating an object, applying the Screen blend mode to composite the object against itself, then blurring an overlapping layer—within a single filter. The Strength parameter controls how much of the blurred image is added back to the original image