![]() Other types of lens filters have also been developed and are regularly utilized by amateur and professional photographers and filmmakers. UV filters are still used, though primarily as a means of protecting the lens, rather than for the purposes of light filtration. Not to mention the wondrous things that can be done to an image using editing software like Lightroom. Film stock is created with less sensitivity, digital cameras have UV-filtration built into their sensors, and modern lenses feature front element coatings that also filter UV light. To combat these effects, filters made of transparent materials such as glass and resin were designed to cover the front of lenses and prevent light with UV wavelengths from entering the camera and being exposed to the film. While imperceptible to the human eye, UV light would add haziness to photos captured on black & white film, and a blueish hue to color film photos. In the early days of photography, it was discovered that film was sensitive to UV light. Other types of light, such as ultraviolet (UV) and infrared (IR), have shorter and longer wavelengths respectively. For example, visible light wavelengths are typically between 400 and 700 nanometers. The distance between waves (called a wavelength) at certain points along the spectrum indicates different types of radiation. The electromagnetic spectrum | Courtesy of NASA Electromagnetic radiation travels in waves of varying frequencies, spanning a range called the electromagnetic spectrum. Technically speaking, light is a type of electromagnetic radiation. However, the primary purpose of all lens filters is to alter the transmission of light through the lens. What is a Lens Filter?ĭifferent filters yield different effects. We’ve broken down everything you need to know, including the different types of filters and when and where to use them. While lens filters initially served a singular purpose – to filter out ultraviolet light – modern filters serve a diverse range of applications. ![]() A 77mm NiSi HUC circular polarizing filter | Courtesy of NiSiĪ camera lens filter is a commonly used photography and cinematography accessory.
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