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In photography and computing, a grayscale or greyscale digital image is an image in which the value of each pixel is a single sample, that is, it carries only intensity information. ... Grayscale images have many shades of gray in between.

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a dark reddish-brown pigment obtained from the inky secretion of the cuttlefish. 2. any cuttlefish of the genus Sepia. 3. a brownish tone imparted to a photograph, esp an early one such as a calotype.

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That range of tones which lie between highlights with detail and shadows with detail. * Usually represents the portion of tone reproduction in which gradations change in proportion to change in brightness. * Compare with mid-tone.

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A highlight is a bright spot in a photograph. Normally it is assumed to be one of the brightest points in the image. Highlights are normally created by a bright or intense illumination or by various forms of diffusion or reflection. Highlights are created by any bright light source.

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a dark area where light from a light source is blocked by an opaque object. It occupies all of the three-dimensional volume behind an object with light in front of it.

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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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Camera resolution is measured in megapixels (meaning millions of pixels); both image ﬁle resolution and monitor resolution are measured in either pixels per inch (ppi) or pixel dimensions (such as 1024 by 768 pixels);

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an ultra wide-angle lens that produces strong visual distortion intended to create a wide panoramic or hemispherical image.

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Unintentional slight movement of a camera during photography or filming, liable to cause blurring of the image.

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to photograph or televise while rotating a camera on its vertical or horizontal axis in order to keep a moving person or object in view or allow the film to record a panorama : to pan from one end of the playing field to the other during the opening of the football game

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The exposure triangle is a common way of associating the three variables that determine the exposure of a photograph: aperture, shutter speed, and ISO. One must balance all three of these to achieve a desired result, an adjustment of one requiring adjustments of at least one of the others

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Exposure compensation is the control by which you temporarily adjust your camera's definition of what is "properly exposed". Put simpler, it's a way to force the camera to make your photos darker or brighter to the degree that you tell it

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In burst mode, several photographs are captured in quick succession by either pressing the shutter button or holding it down. This is used mainly when the subject is in successive motion, such as sports photography

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

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Image editing in photography

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shutter speed or exposure time is the length of time when the film or digital sensor inside the camera is exposed to light, also when a camera's shutter is open when taking a photograph

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allows the photographer to take a picture for as long as the shutter is depressed (that means pushed down, not sad…). ... Now you're in bulb mode. This means the camera will keep taking a picture until your finger comes off the shutter button.Bulb mode is mostly used for long exposures at night

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the apparent streaking of rapidly moving objects in a still image or a sequence of images such as a movie or animation. It results when the image being recorded changes during the recording of a single exposure, either due to rapid movement or long exposure

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Unlike a tripod, monopods cannot support a camera independently. In the case of still cameras, this limits the shutter speed that can be used. ... Many monopods can also be used as a "beltpod,"meaning that the foot of the monopod can rest on the belt or hip of the photographer.

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a photographic technique in which exposures are made by moving a hand-held light source while taking a long exposure photograph, either to illuminate a subject or to shine a point of light directly at the camera, or by moving the camera itself during exposure

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When you press the camera shutter button halfway down to focus, the AF point(s) in use will light up. Red is a favorite color for camera manufacturers to use but some cameras have AF points that are green or another color

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bracketing is the general technique of taking several shots of the same subject using different camera settings

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An electronic viewfinder (EVF) is a camera viewfinder where the image captured by the lens is projected electronically onto a miniature display. The image on this display is used to assist in aiming the camera at the scene to be photographed.

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a device used to measure the amount of light. ... Typically a light meter will include either digital or analog electronic circuit, which allows the photographer to determine which shutter speed and f-number should be selected for an optimum exposure, given a certain lighting situation and film speed

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a still camera designed primarily for simple operation. Most use focus free lenses or autofocus for focusing, automatic systems for setting the exposure options, and have flash units built in. ... None have lens threads.

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this is where the camera makes a best guess on a shot by shot basis. You’ll find it works in many situations but it’s worth venturing out of it for trickier lighting.

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this mode is usually symbolized with a little bulb and is for shooting indoors, especially under tungsten (incandescent) lighting (such as bulb lighting). It generally cools down the colors in photos.

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this compensates for the ‘cool’ light of fluorescent light and will warm up your shots.

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not all cameras have this setting because it sets things as fairly ‘normal’ white balance settings.

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the flash of a camera can be quite a cool light so in Flash WB mode you’ll find it warms up your shots a touch.

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this setting generally warms things up a touch more than ‘daylight’ mode.

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the light in shade is generally cooler (bluer) than shooting in direct sunlight so this mode will warm things up a little.

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one of the main settings on your camera, and it lets you manually control shutter speed, aperture, and ISO

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Program mode has the camera calculate both shutter speed and aperture (given a manually or automatically selected ISO)

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Guide Mode settings allow you to adjust the settings whereas the Scene Mode settings are set for you by the camera making a judgment call on the scene. It’s like shooting in Auto but for a given scene situation.

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a setting on some cameras that allows the user to choose a specific shutter speed while the camera adjusts the aperture to ensure correct exposure

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a mode in a digital camera where the camera's software fully controls all aspects of the photograph, from the shutter speed to the aperture setting to the focus

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the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image.

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digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film

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a set of data that describes and gives information about other data. Photo metadata allows information to be transported with an image file, in a way that can be understood by other software, hardware, and end users, regardless of the format

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an image stabilization technology that minimizes blur caused by camera shake

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a small image representation of a larger image, usually intended to make it easier and faster to look at or manage a group of larger images

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on a camera mode dial, is a setting on some cameras that allows the user to set a specific aperture value (f-number) while the camera selects a shutter speed to match it that will result in proper exposure based on the lighting conditions

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f-number of an optical system such as a camera lens is the ratio of the system's focal length to the diameter of the entrance pupil. It is a dimensionless number that is a quantitative measure of lens speed

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aperture stop of a photographic lens can be adjusted to control the amount of light reaching the film or image sensor. In combination with variation of shutter speed, the aperture size will regulate the film's or image sensor's degree of exposure to light.

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the aesthetic quality of the blur produced in the out-of-focus parts of an image produced by a lens

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the distance between the lens and the image sensor when the subject is in focus, usually stated in millimeters (e.g., 28 mm, 50 mm, or 100 mm). In the case of zoom lenses, both the minimum and maximum focal lengths are stated, for example 18–55 mm.