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The time for which a shutter is open at a given setting.

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Bulb Mode is an exposure setting that is used when seeking to use a shutter speed of more than 30 seconds. Generally, this would be used in extremely low light situations, such as taking photos of the night sky.

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Motion blur is the apparent streaking of moving objects in a photograph or a sequence of frames, such as a film or animation. It results when the image being recorded changes during the recording of a single exposure, due to rapid movement or long exposure.

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Both a tripod and monopod are accessories designed to support a camera — where the two differ are the legs. A tripod has three legs (that's the “tri”). A monopod is a camera support that has one leg (that's the “mono”). ... Construction is often similar and many brands that make tripods also make monopods.

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Camera shake is achieved when your camera is moving during the time of exposure. ... As a result you'll often see a 'blur' that looks like your subject is moving.

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Auto Mode. Automatic Exposure is when the camera chooses the optimum shutter speed, aperture, ISO and flash settings for your shot. All you need to do is point and shoot.

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As the name suggests, “Manual” mode stands for a full manual control of Aperture and Shutter Speed. In this mode, you can manually set both the aperture and the shutter speed to any value you want – the camera lets you fully take over the exposure controls.

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Long-exposure, time-exposure, or slow-shutter photography involves using a long-duration shutter speed to sharply capture the stationary elements of images while blurring, smearing, or obscuring the moving elements.

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Time-lapse photography is a technique in which the frequency at which film frames are captured is much lower than the frequency used to view the sequence. When played at normal speed, time appears to be moving faster and thus lapsing.

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Light painting, painting with light, light drawing, or light art performance photography are terms that describe photographic techniques of moving a light source while taking a long exposure photograph.

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In cinematography and photography panning means swivelling a still or video camera horizontally from a fixed position. This motion is similar to the motion of a person when they turn their head on their neck from left to right.

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Burst mode, also called continuous shooting mode, sports mode, continuous mode, or burst shot, is a shooting mode in still cameras. In burst mode, the photographer captures several photos in quick succession by either pressing the shutter button or holding it down.

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18% grey comes from the world of print,m and is based on reflection. An 18% grey card reflects back 18% of the light that hits it. And it is actually the geometric mean between white paper (95% reflective) and black ink (3.5% reflective).

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Spot metering allows the camera to measure the light reflected from the person's face and expose properly for that, instead of adjusting exposure for the much brighter light around the hairline. With the face properly exposed, the area around the back and hairline will become over-exposed.

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Partial Metering is a camera-metering mode in which the metering is weighted at the center of the viewfinder (unlike center-weighted in which the camera averages the exposure based on the reading at the center). ... Partial metering will enable correct exposure of your subject, however the background will be over-exposed.

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Center-weighted average metering works on the assumption that the most important part of the image is probably in the center. It measures the whole scene but places extra emphasis on the light values in the middle. Center-weighted averaging is a bit of a throwback.

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Evaluative metering is the mostly used automatic metering mode in everyday photography and can be applied in most shooting scenarios. As its name suggests, it takes a series of readings in zones that cover the entire frame, and then calculates the overall average exposure value.

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A file format is a standard way that information is encoded for storage in a computer file. It specifies how bits are used to encode information in a digital storage medium.

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JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality.

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PSD (Photoshop Document) is an image file format native to Adobe's popular Photoshop Application. ... PSD files are commonly used for containing high quality graphics data.

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Portable Network Graphics is a raster-graphics file format that supports lossless data compression. PNG was developed as an improved, non-patented replacement for Graphics Interchange Format

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A RAW file is the uncompressed and unprocessed image data captured by a digital camera or scanner's sensors. Shooting in RAW captures a high level of image detail, with large file sizes and lossless quality.

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In photography and videography, multi-exposure HDR capture is a technique allowing to capture high dynamic range images by taking and then combining several different exposures of the same subject matter. Images captured by cameras allow differentiation only within a certain range of luminosity.

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In photography and cinematography, a multiple exposure is the superimposition of two or more exposures to create a single image

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A triadic color scheme, a unique variant of the split complementary color scheme, with an equal distance between all colors.

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The blue hour is the period of twilight when the Sun is at a significant depth below the horizon. During this time, the remaining sunlight takes on a mostly blue shade.

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In photography, the golden hour is the period of daytime shortly after sunrise or before sunset, during which daylight is redder and softer than when the sun is higher in the sky.

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a lens suitable for taking photographs unusually close to the subject.

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a lens of fixed focal length.

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A digital single-lens reflex camera is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor

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a set of data that describes and gives information about other data.

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Thumbnails are reduced-size versions of pictures or videos, used to help in recognizing and organizing them, serving the same role for images as a normal text index does for words

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The term post-processing is used in the video/film business for quality-improvement image processing methods used in video playback devices, such as stand-alone DVD-Video players; video playing software; and transcoding software.

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Layer masking is a reversible way to hide part of a layer. This gives you more editing flexibility than permanently erasing or deleting part of a layer. Layer masking is useful for making image composites, cutting out objects for use in other documents, and limiting edits to part of a layer.

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Crop factor is a term that describes the difference between your camera's sensor size and a traditional 35mm film frame. It's mainly used as a way of comparing lens focal lengths when fitted to different cameras

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A full-frame DSLR is a digital single-lens reflex camera with a 35mm image sensor format

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APS-C cameras use a smaller area to form the image than traditional 35 mm cameras, and so lenses used on APS-C format cameras have a correspondingly narrower field of view.

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In photography and cinematography, a reflector is an improvised or specialised reflective surface used to redirect light towards a given subject or scene.

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strong, coarse fabric, chiefly used for heavy-duty lining or upholstery.