Introduction Canon 28mm Lens Cap This 28mm Lens Cap from Canon is a center-squeeze snap-on type lens cap for the Canon EF-M 28mm f/3.5 Macro IS STM lens. A front lens cap protects the lens from scratches, moisture, dust, and fingerprints when the lens is not in use. Key Features: Replacement Lens Cap Protects Lens Center-squeeze Snap-on Style What’s in the Box: Canon 28mm Lens Cap