The Front LED Ring Light is designed for use with Laowa 25mm f/2.8 x2.5 - x5 Ultra Macro Lens. As Laowa lenses do not have electronic-aperture, the viewfinder can be very dark when stopped down to the desired aperture like e.g. f/16. This light provides a strong light source on the subject to assist with focusing and exposure.
Please note that you require a power source for this light. It is very light on power, so you can run it for about 5 hours on a 5000MAhs powerbank, which is small and only a few hundred rand.