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Glossary Of Photography Terms [7]

N ND Filter An ND (Neutral Density) filter is a photographic filter that reduces the amount of light entering the camera lens without affecting the color or hue of the image. ND filters are commonly used in photography and cinematography to achieve creative effects and control exposure settings in bright light conditions, such as daylight or when shooting with wide aperture settings. By reducing the amount of light entering the camera, ND filters allow photographers to use slower shutter speeds for motion blur effects, wider aperture settings for shallow depth of field effects, or longer exposure times for capturing dynamic scenes without overexposing the image. ND filters are available in various strengths, typically measured in stops (e.g., ND2, ND4, ND8), with higher ND values indicating greater light reduction. Graduated ND filters, which transition from dark to clear across the filter surface, are also available to help balance exposure between bright skies and darker foregrounds in landscape photography. ND filters are essential tools for photographers seeking to achieve precise control over exposure settings and creative effects in their images.
ND Filter (Neutral Density Filter) An ND (Neutral Density) filter is a photographic accessory that reduces the amount of light entering the camera lens without affecting the color or hue of the image. ND filters are commonly used in photography and cinematography to control exposure settings and achieve specific creative effects, particularly in bright lighting conditions. ND filters come in various strengths, measured in stops, which indicate the degree of light reduction. By reducing the amount of light entering the camera, ND filters enable photographers to use slower shutter speeds for motion blur effects, wider aperture settings for shallow depth of field effects, or longer exposure times for capturing dynamic scenes without overexposing the image. ND filters are especially useful in landscape photography, where they allow photographers to achieve balanced exposures in bright daylight conditions and capture long-exposure effects like silky waterfalls or smooth cloud movements. Graduated ND filters, which transition from dark to clear across the filter surface, are also available to help balance exposure between bright skies and darker foregrounds in landscape photography.
Negative A negative is an image, usually on a strip or sheet of transparent plastic film, in which the lightest areas of the photographed subject appear darkest and the darkest areas appear lightest. This reversed order occurs because the extremely light-sensitive chemicals a camera film must use to capture an image quickly enough for ordinary picture-taking are darkened, rather than bleached, by exposure to light and subsequent photographic processing.
Noise In digital photography, noise refers to the random variations in brightness or color that appear in digital images, resembling grain or speckles. Noise is often caused by electronic interference, amplification of sensor signals, or limitations in the camera's image sensor, particularly when shooting at high ISO sensitivities or in low-light conditions. Different types of noise can occur in digital images, including luminance noise (grayscale variations) and chroma noise (color variations). While some amount of noise may be acceptable and even desirable in certain types of photography, excessive noise can degrade image quality, reduce detail, and compromise overall clarity. Techniques for reducing noise in digital images include using lower ISO settings, improving lighting conditions, employing noise reduction software or in-camera noise reduction algorithms, and shooting in RAW format to retain maximum image quality and flexibility during post-processing.
Noise Reduction Noise reduction is the process of minimizing or eliminating unwanted noise from digital images to improve overall image quality and clarity. In digital photography, noise reduction techniques are used to reduce the visibility of noise artifacts, such as grain or speckles, caused by factors such as high ISO sensitivity, low-light conditions, or limitations in the camera's image sensor. Noise reduction algorithms analyze the pixel data in an image and apply smoothing or averaging techniques to suppress noise while preserving image detail and sharpness. Many digital cameras feature built-in noise reduction settings that automatically apply noise reduction processing to images during capture, while advanced image editing software also offers noise reduction tools that allow photographers to fine-tune noise reduction parameters during post-processing. When applying noise reduction, it's important to strike a balance between noise reduction and image sharpness, as excessive noise reduction can result in loss of detail and a "plastic" appearance in the final image. Photographers should experiment with different noise reduction settings and techniques to achieve the desired balance between noise reduction and image quality in their photographs.
Non-Glare Glass Glass where one or both surfaces have been treated chemically or mechanically to slightly roughen the surface, causing reflected incident light to be dispersed in all directions. Because the glass surface is not smooth, art images behind the glass tend to be softened. The softness depends on how far the art is from the glass. No more than two or three mats are recommended to be used with non-glare glass. If clarity is desired, objects in deep frames (shadow boxes) should not be displayed with non-glare glass.
Non-Glare Plexiglass Acrylic where one or both surfaces have been treated chemically or mechanically to slightly roughen the surface, causing reflected incident light to be dispersed in all directions, minimizing glare. Because the glass surface is not smooth, art images behind the glass tend to be softened. The softness depends on how far the art is from the glass. No more than two or three mats are recommended to be used with non-glare glass. If clarity is desired, objects in deep frames (shadow boxes) should not be displayed with non-glare glass. Order online: Plexiglass Mounting Board or with any Picture Frame order