The Aura Light is a square-shaped fill light at the bottom of the camera module. ... The X100 uses a much wider f/1.6 camera aperture compared to the V30 Pro’s f/1.9 aperture, ...

A reflector makes a useful fill light for a budget studio set-up but nothing beats adding a second light. In this set-up we have replaced our reflector with a “fill” light.

Aperture: The size of the opening of a lens, often referred to as an 'f-stop', as in f/11 or f/8. The larger the f-number, the smaller the aperture and amount of light entering the camera lens.