Metal Lens Cap Filter Front Caps

We protect our lenses with hoods and caps, yet often leave the very filters that shape our light completely vulnerable. The front element is the first line of defense for your entire setup. A scratch there doesn't just ruin the filter; it can softly degrade every single image you take with it.

It’s time to give your filters the first-class protection they deserve. Introducing our Metal Lens Filter Front Caps—the sturdy, reliable, and essential upgrade to those flimsy originals.

Think of these as a mini lens hood and cap in one for your filter. Made from durable anodized aluminum, they screw securely onto the front threads of your filter, forming a rigid shield. This protects the precious front glass from dust, fingerprints, and, most importantly, impacts and scratches that can happen in a packed bag. It’s the simplest and most effective insurance policy for your creative glass.

Complete Size Guide: Find Your Fit

We offer a front cap for virtually every common filter size. Match the diameter of your filter to the list below:

Your Top Questions, Answered

Q1: My filter already came with a front cap. Why do I need this one?
Most filters include a basic, generic plastic front cap. While better than nothing, they are often shallow, pop off easily, and offer minimal crush protection. Our Metal Front Cap is specifically designed for superior defense. It’s deeper, threads on securely so it won’t fall off, and its metal construction provides a hard shell that protects against pressure and impacts. It turns your filter into a robust, self-contained unit.

Q2: Is it just for storage, or can I leave it on while shooting?
Its primary job is storage and transport protection. You should always remove the front cap before shooting. Leaving it on will almost certainly cause severe vignetting (dark corners) in your photos because it extends past the front glass. For shooting, use a proper lens hood on your lens for protection.

Q3: Will it fit with my filter's original rear cap or a Filter Rear Cap?
Absolutely, and this is the perfect combination! For ultimate protection, use our Metal Filter Rear Cap on the back and this Metal Filter Front Cap on the front. Together, they create a sealed, armored capsule for your filter, keeping both glass elements perfectly safe from all angles. It’s the complete protection system.

Q4: I have different brands of filters (NiSi, B+W, Hoya). Will one cap fit all of the same size?
Yes! Compatibility is 100% based on thread diameter, not brand. If you have a 77mm filter from any major manufacturer, our 77mm Metal Front Cap (NP3328) will fit perfectly. Just check the engraved thread size on the rim of your filter (e.g., Ø77mm).

Q5: Are they hard to put on or take off?
Not at all. They feature standard, precision-cut filter threads. They screw on smoothly and snugly with just a gentle turn—exactly like screwing a filter onto a lens. The metal construction also feels more premium and secure in your hand compared to plastic.

For the cost of a single mid-range filter, you can outfit your entire filter collection with these durable metal caps. It’s a small investment that preserves the value and performance of your gear for years.