Our ND filters have ultra-slim rims to avoid any vignetting issues. Our Fixed ND Filters are all in our professional Plus+ range and use the world’s best glass, making them perfect for wide-angle and telephoto lenses.

Neutral density filterOphthalmology

Urth Neutral Density Filters (ND Filters) cut the amount of light entering your camera to unlock motion blur and depth-of-field effects. By filtering out light, Urth ND filters allow you to open up your aperture for a shallower depth of field even in bright light. Or you can compensate for the lower light by slowing your shutter speed and creating motion blur effects without overexposing your photographs. ND filters are a crucial tool for filmmakers too as they allow you to film in bright and harsh light without overexposing or pushing your exposure settings too far. Urth ND filters give you greater creative control when there is excessive light like you’ll experience in outdoor photography and filmmaking. Urth fixed ND filters block a set amount of light, while Urth Variable NDs have a rotating element that adjusts the amount of light blocked depending on what you need. Each ND filter plants 1 tree so future generations can enjoy nature as much as we do now. All our circular filters come with a protective travel tin case, a recycled cleaning cloth, and recycled plastic-free packaging. Read more Read less

How many stops NDfilterfor video

Refraction is a phenomenon that happens when a beam of white light passes through the interface between air and a denser medium, such as glass or water. Light travels more slowly in a denser medium, so it changes direction – or refracts – when it passes through the interface. White light is a mixture of all the wavelengths of light, and each wavelength refracts at a slightly different angle. Therefore, when the beam emerges from the denser medium, it has been split into its component wavelengths. The ones you can see form the familiar rainbow.

Neutral Density FilterCanon

Shine a light through a prism, or hang one in the window on a sunny day, and you'll see a rainbow. It's the same rainbow you see in the sky because, on a day with a mixture of rain and sun, each raindrop acts as a miniature prism. For physicists debating whether light is a wave or particle, this phenomenon is a strong argument for the former. In fact, experiments with prisms were central to Issac Newton's formulation of the theory of optics and the wave nature of light.

While CPL filters polarize light to remove reflections and increase colour saturation, ND filters reduce the amount of light that makes it through to your camera’s sensor, which opens up opportunities to experiment with depth of field and motion blur effects even in bright light.

Deziel, Chris. What Happens To A White Light When It Passes Through A Prism And Why? last modified March 24, 2022. https://www.sciencing.com/happens-light-passes-through-prism-8557530/

Deziel, Chris. (2018, April 30). What Happens To A White Light When It Passes Through A Prism And Why?. sciencing.com. Retrieved from https://www.sciencing.com/happens-light-passes-through-prism-8557530/

Neutral density filterchart

Our Variable ND2-32 is made for low-light, our Variable ND2-400 and ND8-128 are for low-light and bright light, and our ND64-1000 is specifically for harsh bright light and long exposure.

Deziel, Chris. "What Happens To A White Light When It Passes Through A Prism And Why?" sciencing.com, https://www.sciencing.com/happens-light-passes-through-prism-8557530/. 30 April 2018.

Urth Neutral Density Filters (ND Filters) cut out a fixed amount of light unlocking more creative possibilities with your photography and filmmaking. ND Filters allow you to control the amount of light entering your camera so you can create stronger depth-of-field and motion blur effects.

Neutral density filtervs polarizer

What is neutral density filterused for

Many other materials besides glass produce rainbows. Diamond, ice, clear quartz and glycerine are just some examples. The breadth of the rainbow is a function of the index of refraction, which varies directly with the density of the material. You can even see a rainbow when light passes from water through a clear crystal or piece of glass and back into water.

Partnering with a local Australian archival framer, Urth Art prints are framed with sustainably sourced timber to display the artwork, without damaging the environment. And to bring the gallery experience home, Urth Art prints are protected by art-grade acrylic glazing that prevents fading and discolouration.

Urth Neutral Density Filters (ND Filters) cut the amount of light entering your camera to unlock motion blur and depth-of-field effects. By filtering out light, Urth ND filters allow you to open up your aperture for a shallower depth of field even in bright light. Or you can compensate for the lower ... Read more Read less

Variable NDFilter

The angle of refraction in a particular medium is defined by its index of refraction, which is a property derived by dividing the speed of light in a vacuum by the speed of light in that particular medium. When light passes from one medium to another, the angle of refraction can be derived by dividing the indices of refraction of the two media. This relationship is known as Snell's Law, named for the 17th century physicist who discovered it.

Fixed ND filters block a fixed f-stop of light from entering your camera. Variable ND filters provide more flexibility and have a range of f-stops you can block by rotating the outer element. If you’re starting out with ND filters, we recommend a Variable ND so you have more flexibility while you’re learning how to shoot with an ND. If the light is likely to change often, a Variable ND saves you changing between fixed NDs each time.

What is neutral density filtervs ndfilter

Urth Neutral Density Filters (ND Filters) cut out a fixed amount of light unlocking more creative possibilities with your photography and filmmaking. ND Filters allow you to control the amount of light entering your camera so you can create stronger depth-of-field and motion blur effects.

White light refracts when it passes through a prism. Each wavelength refracts at a different angle, and the emergent light forms a rainbow.

The wavelength frequency increases as you proceed across the rainbow from red to violet. This means the energy of the individual photons – or wave packets – also increases, because the two are directly related by Planck's Law.

The first choice you need to make it whether to go for a Fixed ND Filter or a Variable ND Filter. A variable ND filter offers more options, which is great if you’re shooting in changing light conditions, or just starting out with ND filters. A fixed ND provides a specific light reduction and works better with telephoto and wide-angle lenses. The next choice you need to make is the level of light reduction you want. The higher the ND number, the more light it blocks from reaching your camera sensor.

Although we traditionally identify a rainbow by seven component colors, it's actually a continuum with no discrete boundaries from one hue to the next. It was Newton who arbitrarily split the spectrum into seven colors in deference to the ancient Greeks, who believed seven to be a mystical number. The colors are, in order from longest wavelength to shortest, red, orange, yellow, green, blue, indigo and violet. If you're looking for a way to remember the order, use the acronym ROYGBIV, pronounced roy-gee-biv, or try this mnemonic: ROY Gave Betti Violets.

Urth acknowledges the Traditional Custodians of this land, the Arakwal people of Bundjalung Country where we live and work. We pay our deep respect to past, present and emerging Bundjalung storytellers, artists, stewards and their deep connection to Country.