Kinefinity Eagle e-Viewfinder Eye Cup and Eye Cushion

These are the two consumable pieces on the Eagle HDMI e-Viewfinder: the eye cup that shrouds the eyepiece and blocks side light, and the eye cushion that sits between the finder and the operator's face. Both perish with sweat, sunscreen and being packed under something heavier.

On a rental or a shared camera they are also the parts you replace between operators for hygiene rather than wear. Keeping a spare of each in the case costs less than a day of squinting past a torn cup. Order the part you need: they are separate items, not a set.