This heavy-duty optical prism was designed to replace the standard folding waist-level hood on Rolleiflex TLR models. It provides a bright, un-reversed, and laterally correct eye-level image, which was a significant ergonomic improvement for sports, action, and press photographers who found the "mirrored" movement of the waist-level finder difficult to track. The finder features a large circular rubber eyecup and is finished in a durable black crinkle paint that matches the professional aesthetic of the Rolleiflex line. This specific unit bears the "Rollei F&H" (Franke & Heidecke) crest, signifying it is an original factory accessory.