A Sony 16-35mm GM II held in both hands with a NiSi Air UV brass frame filter fitted

Air UV, brass frame

Protection you
can't see.

A UV filter so clear it is like shooting through air: 99.9% peak transmission, about 0.1% reflectivity and a thin brass frame, in 17 sizes from 37mm to 105mm.

  • 99.9% peak transmission
  • 48 layer ULRC coating
  • 17 sizes
Shop Air UV

Before you choose

Find your size

One filter, 17 threads.

Pick the size that matches your lens filter thread. Every size has the same glass, coating and brass frame.

NiSi Air UV filter with a knurled brass frame, on white37mm to 105mm

In the box

  • Air UV filter
  • Plastic storage case
  • NiSi cleaning cloth

Your thread size is printed on the front of the lens or inside the lens cap, next to the diameter symbol.

Why Air UV

Protect the lens, keep the image.

A filter that lives on your lens has to earn its place. This one is built to disappear.

01 / 06

As clear as air

99.9% peak transmission and about 0.1% reflectivity. Held up to the light, the Air UV all but disappears, so your lens sees the scene, not the filter.

Two filters held up to warm city lights: a standard filter showing reflections beside the nearly invisible NiSi Air UV

02 / 06

Made for 100 megapixels

Designed to hold resolution on cameras and lenses over 100 megapixels, so the filter protecting your best lens does not soften it.

A photographer shooting with a Fujifilm GFX and a NiSi Air UV filter fitted

03 / 06

48 layers of ULRC coating

NiSi's Ultra Low Reflective Coating resists scratches, stains, water and oil. Water beads up and smudges wipe away.

Water droplets beading on the ULRC coating of a NiSi Air UV filter

04 / 06

Cuts UV below 395nm

Blocks the ultraviolet that adds blue haze, while visible light passes at an average 99.6% from 420 to 680nm.

A photographer in a hood shooting over rocks in cool blue dusk light

05 / 06

Thin, knurled brass

Brass resists deforming better than aluminium, the knurled edge is easy to grip even in cold or wet conditions, and the slim profile avoids vignetting on ultra-wide lenses.

Close-up of the knurled brass frame of a NiSi Air UV filter on white

06 / 06

Tested before it ships

Every filter is checked for transmission and reflectivity on a Shimadzu spectrophotometer, and comes with a storage case and a cleaning cloth.

A NiSi Air UV filter with its NiSi cleaning cloth on a dark background

Filter on and off

See for yourself.

Our own test frames, shot with and without the filter.

Reflections

Held up to bright city lights, a standard UV filter mirrors the scene. The Air UV barely shows.

A standard UV filter held up to city lights, showing strong reflections
Held to the lightStandard UV
A NiSi Air UV filter held up to the same lights, almost invisible
Held to the lightAir UV

Detail on a 100 megapixel sensor

The same test chart on a Fujifilm GFX, without and with the filter, then 100% crops from the centre and the top-left corner.

Resolution test chart photographed on a Fujifilm GFX with no filter
Full frameNo filter
The same test chart photographed with a NiSi Air UV fitted
Full frameAir UV
100 percent crop from the centre of the test chart with no filter
Centre, 100%No filter
100 percent crop from the centre of the test chart with the Air UV
Centre, 100%Air UV
100 percent crop from the top-left corner of the test chart with no filter
Corner, 100%No filter
100 percent crop from the top-left corner of the test chart with the Air UV
Corner, 100%Air UV

Colour

Saturated reds and greens, without and with the filter.

Red bougainvillea photographed with no filter
BougainvilleaNo filter
The same bougainvillea photographed with a NiSi Air UV fitted
BougainvilleaAir UV

Specifications

The numbers.

Peak transmission99.9%
Average transmission99.6%, 420 to 680nm
ReflectivityAbout 0.1%
Coating48-layer ULRC (Ultra Low Reflective Coating), scratch, stain, water and oil resistant
UV cutBlocks UV light below 395nm
GlassLens-grade optical glass
FrameUltra-thin brass with a knurled edge
Sizes37mm, 39mm, 40.5mm, 43mm, 46mm, 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm, 86mm, 95mm, 105mm
In the boxFilter, plastic storage case, cleaning cloth
Quality controlTransmission and reflectivity tested on a Shimadzu spectrophotometer
NiSi Air UV transmission curve by wavelength, rising sharply near 400nm and staying close to 100% across visible light
TransmissionPercent of light passed, by wavelength
NiSi Air UV reflectance curve from 400 to 700nm, staying near zero across most of the range
ReflectancePercent of light reflected, 400 to 700nm

Watch

Air UV on video.

The launch film and a closer look. Videos load only when you press play, so the page stays fast.

LaunchThe best UV filter for your lens: introducing the NiSi Air UV Closer lookA closer look at the NiSi Air UV

Questions

Before you buy.

Will a UV filter lower my image quality?

A poor one can, through lost light and reflections. The Air UV passes 99.9% of light at its peak and an average 99.6% from 420 to 680nm, with reflectivity of about 0.1%, so it protects the lens without adding glare.

Is it sharp enough for a 100 megapixel camera?

Yes. It is designed for cameras and lenses over 100 megapixels. The test chart under Filter on and off was shot on a Fujifilm GFX with and without the filter, with 100% crops from the centre and the corner.

Will it vignette on a wide-angle lens?

The frame is ultra thin, designed to avoid vignetting even on ultra-wide-angle lenses.

Why a brass frame?

Brass is more durable and resists deforming better than aluminium, so the filter keeps threading smoothly. The knurled edge makes it easy to fit and remove.

What does the ULRC coating do?

ULRC is NiSi's Ultra Low Reflective Coating, 48 layers deep. It keeps reflections low and resists scratches, stains, water and oil, so the filter is easy to clean.

Does it change the colour of my photos?

No colour cast is added. It blocks UV light below 395nm, which reduces blue haze, and passes visible light evenly.

Which size do I need?

Match your lens filter thread, printed on the front of the lens or inside the lens cap next to the diameter symbol. The Air UV comes in 17 sizes from 37mm to 105mm.

What comes in the box?

The filter, a plastic storage case and a NiSi cleaning cloth.

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