The 37.5mm Front Lens Cover from Pentax is a front lens cover specifically designed for the Pentax 05 Toy Lens Telephoto for the Q-series Interchangeable Lens cameras. Lens covers protect lenses from dust, moisture, fingerprints and scratches and having a spare lens cover is crucial when a lens cover inevitably goes missing on vacation or assignment. This lens cover is black and made to fit over the front lens and hold snugly in place.