2

Relative size (distance) is often correlated with diffusion/softness, as if the only thing you have to worry about/change is the distance of the light/modifier... which is wrong because distance significantly impacts the light output requirement, the resulting light falloff, and significant characteristics of the resulting image. Using modifiers/diffusion ...


2

Ambient exposure is controlled by iso, aperture, and shutter speed. But flash exposure is controlled by iso, aperture, flash power, and subject-to-flash distance. If you want to lower the flash power, increase your ISO, open up the aperture, or get closer to your subject. If you balance your flash to be only fill against the ambient (i.e., most of the ...


2

In addition to the Rosco kit you mentioned it might also be worth taking a look at LEE filters. They offer a visual comparison of their diffusion materials. There is also a quite useful comparison of different bounce and diffusion materials by Matt Porwoll. While these demonstrations are mainly intended for larger-scale photographic and cinematographic use,...


1

Diffusion evens light out by scattering the light (so that it mixes together), which inherently spreads the light out, which inherently reduces the light density (power). Diffusion also absorbs/blocks some light... It is quite probable that you will loose 50% of the available power (1 stop) in order to even such a light source out; it's quite likely you will ...


1

A "larger light" has the concept that its outer areas will direct the light inward into the subject. Those additional paths inward from wide and different angles of course help to fill the harsh shadows from other paths, hence greater softness. The multiple angles do this. Diffusion can be good too, but a "diffused light" merely scatters the light, mostly ...


Only top voted, non community-wiki answers of a minimum length are eligible