NiSi Armor FX Pro Nano L395 UV 52 mm – Impact-Resistant UV Protection Filter

NiSi Armor FX Pro Nano L395 UV 52 mm is a heavy-duty UV protection filter for lenses with a 52 mm thread. It is designed to stay intact under strong impacts that would shatter a standard UV filter, so the lens stays protected on adventures, travel and action shoots. CINE optical glass with double-sided nano coating gives 99% transmission, neutral colours and full 8K sharpness, and the 3.5 mm knurled brass frame does not vignette down to 14 mm.

Looking for a protective filter that survives what a normal UV filter does not? The NiSi Armor FX Pro Nano L395 UV 52 mm is a UV protection filter for lenses with a 52 mm filter thread, built to withstand heavy impacts – where a traditional UV filter shatters, the Armor FX stays in one piece and keeps protecting the lens. Inside is CINE optical glass with double-sided low-reflection nano coating (99% transmission), UHD double-sided polishing for 8K sharpness, and a UV cut below 395 nm against haze and blue cast. The ultra-slim 3.5 mm brass frame with twill knurling is easy to grip and free of vignetting even on 14 mm lenses.

KEY FEATURES

• Impact-resistant: designed to withstand heavy impacts – traditional UV filters shatter, the Armor FX stays intact.
• FX effect: in the unlikely event of a crack, NiSi says it turns into a creative effects filter.
• CINE optical glass: high light transmittance, neutral colour, no loss of sharpness.
• Double-sided nano coating: 99% transmission, low reflection, waterproof, oil-proof, easy to clean.
• UHD technology: double-sided high-precision polishing for 8K ultra-high definition.
• UV cut L395: blocks UV below 395 nm – less haze and blue cast.
• 3.5 mm brass frame: twill knurling for grip, no vignetting even on 14 mm lenses.
• Many sizes: available in 39, 40.5, 43, 46, 49, 52, 55, 58, 62, 67, 72, 77, 82, 86, 95 mm.

WHEN TO USE A HEAVY-DUTY PROTECTIVE FILTER

Use the Armor FX wherever the lens is at real risk – it is designed for situations in which a normal filter would break.

• Adventure and expeditions: rocks, ice, falls and transport in a backpack.
• Action and sports: mountain biking, skiing, motorsport, close to the action.
• Beach, desert and sea: sand, salt spray and wind.
• Events and street: crowds, bumps and accidental knocks.
• Rental and shared gear: the filter takes the hits instead of the front element.

BUILT TO TAKE THE HIT

After a strong impact: a standard UV filter shatters (left), the NiSi Armor FX stays in one piece (right) – NiSi test.

ADVANTAGES OVER A STANDARD UV FILTER

• Does not shatter like ordinary glass: standard UV filters break on strong impact – sharp shards can damage the lens.
• CINE glass: better transmission and neutral colour than basic filter glass.
• Brass frame: stronger than aluminium, does not jam on the lens thread.
• Slim 3.5 mm: no vignetting even on very wide lenses.

WHICH FILTER DO I NEED?

HOW TO USE A UV / PROTECTIVE FILTER

A UV / protective filter stays on the lens all the time. It does not change the exposure or colours – it protects the front element from dust, rain, sand, sea spray, fingerprints and knocks, and a clean filter is much cheaper to replace than a scratched lens.

1. Screw it on finger-tight as soon as you unpack the lens.
2. Keep it clean – a dirty protective filter costs contrast, especially against the light.
3. Take it off for special filters – when you use a CPL, ND or Black Mist, unscrew the UV filter instead of stacking.
4. Use a lens hood – it reduces flare and protects the filter from side light and bumps.

Common mistakes:

• Cheap uncoated glass – causes flare and ghosting at night and against the sun; a multi-coated filter avoids it.
• Stacking on wide-angle lenses – a UV filter plus another filter can cause dark corners.
• Night shots of bright lights – if you see ghost reflections of street lights, take the filter off for that shot.

HOW TO FIND YOUR FILTER SIZE

The filter thread is printed on the front of the lens barrel or inside the lens cap, marked with the ø symbol (for example ø52). The filter size must be exactly the same – this filter is 52 mm. The table below shows typical sizes, but always check your own lens.

Tip – one filter for several lenses: buy the filter for your largest filter thread and use step-up rings for lenses with smaller threads, for example a K&F Concept step-up / step-down ring set. A step-up ring goes from a smaller lens thread to a larger filter (e.g. 67 → 77 mm) and does not cause vignetting; a step-down ring (larger lens, smaller filter) usually does. The only drawback: the standard lens hood and lens cap may not fit with the ring attached.

CINE OPTICAL GLASS AND NANO COATING

Double-sided low-reflection nano coating gives 99% transmittance with extremely low reflection. The surface is waterproof and oil-proof, so it is easy to clean. UHD double-sided high-precision polishing keeps full sharpness even with 8K and high-megapixel sensors.

3.5 MM BRASS TWILL FRAME

The ultra-slim 3.5 mm brass frame with twill knurling gives a secure grip and prevents vignetting even on lenses as wide as 14 mm.

FX – A SECOND LIFE

In the rare event that the filter cracks, NiSi says the cracked glass turns into a unique creative effects filter – hence the name FX.

COMBINING FILTERS

• CPL + ND: for long exposures of water with the reflections removed. Put the ND filter on the lens first and the CPL in front, so you can still rotate it.
• Two filters at most: every extra layer of glass adds risk of flare, reflections and loss of sharpness; more than two filters on a wide-angle lens almost always cause vignetting.
• Slim frames for wide angles: on lenses wider than about 24 mm (full frame) use slim filters and check the corners at the widest focal length.
• One filter instead of two: combined filters such as ND + CPL in one frame avoid stacking altogether.
• Systems for faster work: filter systems with an adapter ring (magnetic or press-fit, e.g. NiSi Swift) let you add or swap filters without unscrewing them each time.

USE IT WITH

• Step-up rings: K&F Concept step-up / step-down ring set – one filter for lenses with smaller threads.
• Cleaning: Lenspen cleaning pen and K&F Concept microfibre cloths.
• Filter storage: Moment filter case or Lowepro GearUp Filter Pouch 100.

WHICH NiSi UV FILTER TO CHOOSE?

NiSi makes several UV / protective filters. All block UV light below 395 nm; they differ in glass, coating and frame.

ARMOR FX VS OTHER NiSi UV FILTERS

• Armor FX vs AIR UV: AIR UV has the highest transmission (99.9%); Armor FX is the toughest.
• Armor FX vs SMC UV L395: SMC is the basic everyday option; Armor FX is for gear at real risk.

CARE AND CLEANING

1. Blow off dust first – a blower or a soft brush removes sand and grit that could scratch the glass.
2. Clean fingerprints and drops with a Lenspen cleaning pen or a dry K&F Concept microfibre cloths; wipe from the centre outwards.
3. Do not breathe on the glass and do not use household cleaners – they can damage the coating.
4. Store filters in a case, such as the Moment filter case or Lowepro GearUp Filter Pouch 100, not loose in a bag.
5. Do not over-tighten – if a filter gets stuck, a rubber filter wrench or a rubber glove helps; never use tools that bend the frame.
6. Cold to warm – after coming in from the cold, let the filter warm up in a closed bag before cleaning to avoid condensation.

FREQUENTLY ASKED QUESTIONS

Which size do I need?

The size of your lens filter thread (marked ø on the lens or inside the lens cap). This product is 52 mm.

Is the Armor FX unbreakable?

No filter is unbreakable, but NiSi designs it to withstand heavy impacts that would shatter a standard UV filter.

Does it affect image quality?

CINE glass with 99% transmission and UHD polishing – no visible loss of sharpness, neutral colours.

Will it vignette on my wide-angle lens?

NiSi states no vignetting down to 14 mm thanks to the 3.5 mm frame.

Can I use a lens cap?

Yes, the filter takes a standard lens cap.