What Is Diffusion? | Gerald Undone Explains

In order to understand what a diffusion filter is and why you might want to use you need to know the proper definition of two things; diffusion and halation. We talk about diffusion all the time when it comes to lighting subjects and usually it's as simple as putting some fabric in front of our light source is a great example of diffusion, because diffusion in physics simply refers to moving something which can be light or even molecules from a point of higher concentration to lower concentration or more simply spreading something out. Halation is a visual representation of which can be seen in our photos and video by the actual light being spread out beyond the proper boundaries of the fixture or source. If you're into video games rendering or computer graphics, you might know this effect as bloom. Which is a simulated gradient used to express the immense brightness of a light source. These concepts are important because they're the direct results of using a mist filter on your lens. Of course the effect permeates more than just a halo around a light source and you can also see what appears to be a reduction in harshness on skin filling in some shadows and fine lines and creating a softer complexion. This is heavily dependent on the strength of the filter which can range from a subtle smoothing to a full-out glow seemingly emanating from the subject's face. Learn more about the PMVND MIST EDITION here.