Profoto 100991 Medium Umbrella Diffuser

The Profoto 100991 Medium Umbrella Diffuser is a purpose-built accessory that attaches over the front of Profoto medium shallow and deep umbrellas in white or silver finishes. By enclosing the open face of the umbrella, it transforms the modifier into something closer to a softbox — containing light spill, reducing harsh specular reflections, and producing a noticeably softer, more diffused illumination on your subject. This is particularly useful for portrait, beauty, and product photography where controlled, flattering light is essential.

The diffuser is lightweight and folds flat, making it easy to pack alongside your umbrella for on-location work. Installation is quick — it simply stretches over the umbrella's front edge. Photographers should account for the approximately 1.5-stop reduction in light output when planning exposures, which may require adjusting flash power or aperture accordingly. Backed by Profoto's limited 1-year warranty, this diffuser is a practical upgrade for anyone who already owns compatible Profoto medium umbrellas and wants more versatility from their existing gear.