Looking for a lens cap? This page brings together front and rear lens caps for cameras and lenses, from Montreal's Excellent Photo. A good cap keeps dust, fingerprints and scratches off the glass while your gear is in the bag, so it is one of the cheapest ways to protect a lens.
How to choose a lens cap
- Size first. A front cap is chosen by the filter thread diameter of your lens, printed on the lens barrel or front ring (for example 52 mm, 58 mm or 77 mm). Sizes here run from 37 mm to 112 mm.
- Front or rear. A front cap covers the glass; a rear cap protects the back element and mount when a lens is off the camera. Keep one of each for lenses you swap often.
- Snap-on or deluxe. Snap-on caps are simple and quick to remove. Some models, like the Optex 40.5mm Lens Cap with String, include a string so the cap is harder to lose.
- Check your model. Rear caps are made for a specific mount, so confirm your camera system before ordering.
Brands we carry
Sony front caps cover many sizes, such as the Sony ALC-F82S - 82 mm Front Lens Cap, and the Sony ALC-R1EM - Rear lens cap is a popular rear option. For a budget-friendly everyday cap, see the Optex 58mm Snap On Lens Cap from Optex. We also list caps from Canon, Nikon, Tamron (rear caps for Canon EOS, Sony E and Nikon Z lenses), Blackmagic Design and Tiffen.
For action cameras, the Insta360 Lens Cap for X4 is one of several Insta360 options. Need more protection? Browse our lens hoods and lens cases too.
Frequently asked questions
What size lens cap do I need?
Match the filter thread diameter of your lens, marked in millimetres on the lens. Check it before you order.
What is a rear lens cap for?
It covers the back of the lens and its mount when the lens is off the camera, keeping dust and scratches away.
What is the best lens cap?
The best one is the one that fits your lens securely. Brand-matched caps from Sony or Canon are a safe choice, while snap-on caps from Optex are a practical, affordable alternative.
Is a lens cap different for a DSLR and a mirrorless camera?
Front caps depend on lens diameter, not camera type. Rear caps depend on the lens mount, so check your system.