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Lens Filters

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Lens filters are the easiest upgrade to your image quality. Whether you're cutting glare with a circular polarizer, balancing long exposures with an ND filter, or protecting your front element with a UV filter, our range covers every thread size and shooting style.
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Lens Filters: Control Light, Protect Glass, Elevate Results

Lens filters are one of the few accessories that genuinely change what you can capture — not just in post, but in the moment. A circular polarizer kills reflections that no amount of editing can remove. A 10-stop ND turns a noon waterfall into silk. And a good UV filter protects the front element of an expensive lens from dust, moisture, and scratches. We carry NiSi, Hoya, K&F Concept, Urth, and more — in screw-on, drop-in, and square systems, in sizes from 37mm to 95mm and beyond.

Buying Guide: Lens Filters

The right filter can save a shot the camera alone can't. The wrong size won't even fit on your lens. Here's what to think through:

Know your thread size

Every lens has a filter thread size in millimeters (typically 37mm, 49mm, 52mm, 58mm, 67mm, 72mm, 77mm, or 82mm) — printed on the inside of the front cap, on the front element ring, or in the lens specs. Filters are sold per-size, so a 77mm CPL won't fit a 67mm lens without a step-up ring.

Pick the filter type that solves a real problem

A circular polarizer (CPL) cuts reflections off water, glass, and foliage — best filter you'll ever own for landscapes. A neutral density (ND) filter darkens the scene so you can use slower shutter speeds in daylight (silky waterfalls, motion blur) or shoot wide-open in bright light for shallow depth of field. Variable ND filters give you a range in one filter — fast for video. UV filters do little optically on modern digital cameras but offer cheap front-element protection.

Glass quality matters more than you think

A cheap filter on an expensive lens is a downgrade. Look for multi-coated optical glass with low color cast. Brands like NiSi, Hoya, B+W, and K&F Concept's pro lines give you 90% of the performance of premium options at a fraction of the cost.

Screw-on vs square/drop-in systems

Screw-on filters are simple and per-lens. Square/drop-in systems (NiSi V7, Lee, etc.) use one set of filters with adapter rings for each lens — more expensive upfront but flexible if you own multiple lenses and shoot a lot of landscape. Cinema work often uses matte-box-mounted square filters.

How do I find my lens's filter thread size?

Look for a number with the ⌀ (diameter) symbol printed on the front of your lens, or check the lens specs. If you're between lens sizes, a step-up ring lets one larger filter work on multiple lenses.

What's the difference between UV, ND, and polarizer?

UV blocks ultraviolet light (mostly irrelevant on modern sensors — it's now mainly used as physical protection). ND reduces the total light entering the lens, letting you use slower shutter speeds or wider apertures in bright conditions. A polarizer (CPL) selectively cuts polarized light — that's what kills reflections and deepens skies.

Variable ND or fixed ND filters?

Variable NDs are convenient — one filter, multiple stops of darkening with a twist. Great for video. Cheap variable NDs can introduce an X-pattern at maximum darkening, so spend up for a quality unit. Fixed NDs (3-stop, 6-stop, 10-stop) are more predictable for long-exposure photography.

Do I need a UV filter to protect my lens?

Honest answer: only if you're shooting in dusty, wet, or rough conditions. A high-quality lens hood actually does more for physical protection in most cases. If you do want UV protection, don't skimp — a cheap filter degrades image quality.

Why does one filter cost $20 and another $200?

Glass quality, multi-coating layers, color neutrality, and brass vs aluminum rings. Premium filters preserve sharpness and don't introduce color casts; cheap filters can soften edges and tint your images. Match the filter to the lens — don't put a $20 ND on a $2,000 lens.

Can I stack multiple filters?

Yes, but two cautions: thicker stacks can vignette (dark corners) on wide lenses, and each layer adds reflection risk. A CPL plus an ND is a common, safe combination; beyond that, watch for issues.

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Visit Us in Milwaukee — Impulse is Milwaukee's go-to camera shop for lens filters. Drop into our Oak Creek store to see filter samples on a light box and match the right thread size to your kit, or reach us at sales@impulsemke.com.
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