Universal Spare Lens Cap with One-Touch Installation and Removal Key benefits - Fast one-touch removal: Simply press the internal on/off button to remove the cap with one touch. The inner design has no protrusions or knobs on the outer edge, so it stays secure even when the camera is lowered from the shoulder. - Universal compatibility: Simple design without manufacturer branding. Compatible with Nikon, Canon, Sony, Panasonic, Olympus, Ricoh, Fujifilm, Pentax, Sigma, Tamron, Leica, Konica Minolta, and more. - Size options to fit many lenses: Available in multiple sizes to match different filter diameters. Size options (inch): 1.5, 1.7, 1.7, 1.8, 1.9, 1.9, 2.0, 2.2, 2.3, 2.3, 2.3, 2.3, 2.3, 3.2, 3.2. Corresponding filter diameters (mm): 37, 40.5, 43, 46, 49, 52, 52, 67.2, 72, 72, 72, 72, 72, 72, 72. - Practical and reliable design: The cap is designed to stay secure during normal use and quick to remove when needed. What you get - A universal spare lens cap with an internal push button for easy one-touch installation and removal - Compatibility across multiple camera brands and lenses as listed above - A range of sizes to match common lens filter diameters How to choose size - Check your lens filter diameter and select the cap size that matches that measurement. The available size options cover a wide range to fit most standard lenses. Precautions for use - May not be compatible with some lenses such as micro lenses, fisheye lenses, or large aperture zoom lenses. - If using with a lens that is not listed or has an unusual diameter, consider installing a filter or similar accessory as appropriate.