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a category of artistic composition, as in music or literature, characterized by similarities in form, style, or subject matter.

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A camera obscura is a darkened room with a small hole or lens at one side through which an image is projected onto a wall or table opposite the hole.

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35 mm film is a film gauge used in filmmaking, and the film standard. In motion pictures that record on film, 35 mm is the most commonly used gauge.

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is a type of camera with two objective lenses of the same focal length.

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The gelatin silver process is the most commonly used chemical process in black-and-white photography

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a keeper or custodian of a museum or other collection.

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a public display of works of art or items of interest, held in an art gallery or museum or at a trade fair.

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a room or building for the display or sale of works of art.

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a building in which objects of historical, scientific, artistic, or cultural interest are stored and exhibited.

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A line is an identifiable path created by a point moving in space

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An element of art that is two-dimensional, flat, or limited to height and width

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Color photography is photography that uses media capable of capturing and reproducing colors

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In essence, textures are details that visually describe how something physically feels

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Value in photography describes the range of light in your image.

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Form refers to when shape takes on three dimensions.

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The rule of space in photography is simply the act of adding visual space in front of the direction that an object is moving, looking or pointing to imply motion and direction and to lead the eye of the viewer.

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Balance is a composition technique that arranges elements within the frame to achieve equal visual weight across the image.

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Variety is the principle of art that adds interest to an artwork.

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Pattern in Photography is a regularity within a scene.

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Proportion in photography is usually comparing size of objects, or the amount of one thing to the whole.

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Movement in photography simply refers to elements of a photo that are moving

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Unity describes the visual relationship between elements in a photograph

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Emphasis draws viewers into your image and holds them there long enough to tell your story.

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Radial balance is defined as a type of visual balance where portions of the image radiate or extend from a central point in the frame

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The dictionary states “the quality of being made up of exactly similar parts facing each other or around an axis.”

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When a photo is asymmetrical, it has unequal visual weight on either side.

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For the purposes of a 'juxtaposition in photography' definition, we can say that juxtaposition photography involves combining two or more elements in the same picture, highlighting the interesting contrast between them, to create an eye-catching and thought-provoking image.

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Abstract photography, sometimes called non-objective, experimental or conceptual photography, is a means of depicting a visual image that does not have an immediate association with the object world and that has been created through the use of photographic equipment, processes or materials.

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dark colors like blue, purple, indigo

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light colors like red, yellow, orange

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Neutral colors are muted shades that appear to lack color but often have underlying hues that change with different lighting.

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Complementary colors are pairs of colors which, when combined or mixed

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Monochromatic colors are all the colors of a single hue.

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Color gradients, or color transitions, are defined as a gradual blending from one color to another

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The rule of thirds is a composition guideline that places your subject in the left or right third of an image, leaving the other two thirds more open

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What are leading lines in photography? “Leading lines are a compositional technique where human-made or natural lines lead the viewer's eyes through a photograph to the subject or the heart of the image,”

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The photograph is divided into nine rectangles along two horizontal and vertical lines according to the golden ratio

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Negative space photography is related to minimalist photography.

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Backlight in photography involves positioning the main light source for a photograph behind the primary subject

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Diffused light, or soft light, is light that's filtered by something.

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Ambient light is any light a photographer or cinematographer did not bring to the shoot.

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Chiaroscuro is a renaissance painting technique which literally means “light-dark” in Italian.

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A silhouette is a solid, dark image of a subject against a brighter background.

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a painting, especially an altarpiece, on two hinged wooden panels which may be closed like a book.

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A triptych is a work of art that is divided into three sections

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Orthographic projection is a means of representing three-dimensional objects in two dimensions.

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Barrel distortion describes a type of distortion wherein lines that are straight in real life appear to curve inwards

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in geometric optics, distortion is a deviation from rectilinear projection; a projection in which straight lines in a scene remain straight in an image. It is a form of optical aberration.

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ISO is your camera's sensitivity to light as it pertains to either film or a digital sensor

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The ASA (American Standards Association) scale is an arbitrary rating of film speed; that is, the sensitivity of the film to light.

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An image sensor is a device that allows the camera to convert photons – that is, light – into electrical signals that can be interpreted by the device.

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Film grain is the visible silver crystals in a film negative's emulsion.

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Just like with sound, where noise refers to auditory disruptions, in photography, the term digital noise refers to visual distortion

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a space through which light passes in an optical or photographic instrument, especially the variable opening by which light enters a camera.

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1. a camera setting corresponding to a particular f-number.

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The focal length of a lens is determined when the lens is focused at infinity.

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Description: Depth of field, sometimes referred to as DOF, refers to how much of an image is in focus, specifically the distance between the nearest and farthest in-focus parts of an image.

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the visual quality of the out-of-focus areas of a photographic image, especially as rendered by a particular lens.

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Automatic mode means the mode of operating an automated motor vehicle when automated technology is engaged to enable the motor vehicle to operate without any control or monitoring by an operator.

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In program mode the camera selects and sets both the shutter speed and the aperture. For any given brightness of light, the camera has been programmed to set a specific combination of shutter speed and aperture. In low light, for example, the camera might set 1/30 second and f4.

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As the name suggests, “Manual” mode stands for a full manual control of Aperture and Shutter Speed

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Shutter Speed Priority AE, or simply 'Shutter Priority', is a shooting mode whereby the photographer sets the shutter speed, while the camera automatically sets the Aperture. See TV Mode and shutter speed.

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In digital photography, camera technology now features modes that can help adjust those settings for you. One of those modes is aperture priority. With it, the photographer selects a specific aperture value and the camera autoselects the proper shutter speed based on how much light it detects.

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In photography, shutter speed or exposure time is the length of time that the film or digital sensor inside the camera is exposed to light when taking a photograph

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The Bulb setting on camera shutters is a momentary-action mode that holds shutters open for as long as a photographer depresses the shutter-release button

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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.

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In photography, a tripod is a portable device used to support, stabilize and elevate a camera

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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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1. denoting the photographic technique of taking a sequence of frames at set intervals to record changes that take place slowly over time. When the frames are shown at normal speed, or in quick succession, the action seems much faster.

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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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Panning is a photographic technique that combines a slow shutter speed with camera motion to create a sense of speed around a moving object

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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 where several photos are captured in quick succession by either pressing the shutter button or holding it down.

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In photography, the metering mode refers to the way in which a camera determines exposure.

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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.

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A shadow is the result of the relationship between the subject's location and the direction of the light source.

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A medium tone, one that is neither very dark nor very light.

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Highlights are the lightest elements in an image, whereas shadows are the darkest areas

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The Workspace Switcher panel plugin allows you to switch between virtual desktops and display your workspace layout in your panel.

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The toolbar, also called a bar or standard toolbar is a graphical control element on which on-screen icons can be used.

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a thin board or slab on which an artist lays and mixes colors.

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A menu bar is a graphical control element which contains drop-down menus.

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Every tool in Photoshop, from the Eraser to the Paint Bucket, has different variations. Learn how to tap into their power with the options bar.

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The word Crop can be defined as “to trim” or “cut back”. The Crop tool in most image processing programs is used to trim off the outside edges of a digital image.

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The aspect ratio is the proportional relationship between an image's width and height.

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PPI describes the resolution in pixels of a digital image whereas DPI describes the amount of ink dots on a printed image

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SOOC is an abbreviation of the photography term “Straight Out Of Camera”, simply meaning that an image can be good enough to print straight from the camera without further processing.

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A file format is a standard way that information is encoded for storage in a computer file

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A camera raw image file contains unprocessed or minimally processed data from the image sensor of either a digital camera, a motion picture film scanner, or other image scanner

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At the most basic level, an HDR photo is really just two (or three, or nine) photos taken at different exposure levels and then mashed together

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In film photography, a double exposure is a combination of two exposures in one image to produce evocative results.

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The Triadic color scheme is based on three colors that are evenly spaced around the color wheel.

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The blue hour is the period of twilight when the Sun is at a significant depth below the horizon.

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The golden hour is a short window, after which the sun will slip below the horizon or level off into harsher light after sunrise

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Macro photography is extreme close-up photography, usually of very small subjects and living organisms like insects, in which the size of the subject in the photograph is greater than life size.

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In film and photography, a prime lens is a fixed focal length photographic lens (as opposed to a zoom lens), typically with a maximum aperture from f2. 8 to f1. 2.

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A telephoto lens, in photography and cinematography, is a specific type of a long-focus lens in which the physical length

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

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Vibration Reduction (VR) is an image stabilization technology that minimizes blur caused by camera shake.

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Crop factor or magnification factor refers to the diagonal measurement of a camera's sensor size when compared to the diagonal measurement of a traditional 35mm frame of film