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

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35 mm film (millimeter) is the film gauge most commonly used for motion pictures and chemical still photograph

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A twin-lens reflex camera (TLR) is a type of camera with two objective lenses of the same focal length. One of the lenses is the photographic objective or "taking lens" (the lens that takes the picture), while the other is used for the viewfinder system, which is usually viewed from above at waist level.

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Large format is larger than "medium format", the 6×6 cm (2¼×2¼ inch) or 6×9 cm (2¼×3½ inch) size of Hasselblad, Rollei, Kowa, and Pentax cameras (using 120- and 220-roll film), and much larger than the 24×36 mm (0.95×1.42 inch) frame of 35 mm format.

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The gelatin silver process is the photographic process used with currently available black-and-white films and printing papers. A suspension of silver salts in gelatin is coated onto a support such as glass, flexible plastic or film, baryta paper, or resin-coated paper.

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the action of framing something.

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

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the action of framing something.

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

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the exclusive legal right, given to an originator or an assignee to print, publish, perform, film, or record literary, artistic, or musical material, and to authorize others to do the same.

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A point moving through space, A long narrow line

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When thinking of shape in photography, imagine a flat, two-dimensional object without light and shadow.

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Color (or colour) photography is photography that uses media capable of reproducing colors.

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the visible shape or configuration of something

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When talking about photography texture refers to the visual quality of the surface of an object

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exposure value (EV) is a number that represents a combination of a camera's shutter speed and f-number

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Put simply, negative space is the area which surrounds the main subject in your photo

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Emphasis is defined as an area or object within the artwork that draws attention and becomes a focal point.

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refers to the arrangement of opposite elements (light vs. dark colors, rough vs. smooth textures, large vs. small shapes, etc.)

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Repetition refers to one object or shape repeated; pattern is a combination of elements or shapes repeated

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Proportion refers to the relative size and scale of the various elements in a design.

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Balance is the distribution of the visual weight of objects, colors, texture, and space.

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Movement is the path the viewer's eye takes through the work of art, often to focal areas.

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Unity exists when your elements agree. Unity can be seen as the single most important goal of any design

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Cool colors — such as blue, green, and purple (violet); evoke a cool feeling because they remind us of things like water or grass.

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Warm colors — such as red, yellow, and orange; evoke warmth because they remind us of things like the sun or fire.

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colors directly opposite each other in the color spectrum, such as red and green or blue and orange, that when combined in the right proportions, produce white light.

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Abstract photography is based on the photographers eye. We're looking to capture something in a way that it would not usually be seen.

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The rule of thirds is a "rule of thumb" or guideline which applies to the process of composing visual images such as designs, films, paintings, and photographs.

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The golden ratio is a ratio which has continued to surprise artists, scientists, musicians and mathematicians for centuries.

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Leading lines refers to a technique of composition where the viewer of your photos attention is drawn to lines that lead to the main subject of the image. A leading line paves an easy path for the eye to follow through different elements of a photo

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Objective photography is an impersonal image not influenced by feelings, interpretations or prejudice

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Often containing helpful and specific suggestions for positive change, constructive criticism is highly focused on a particular issue or set of issues, as opposed to providing general feedback on the item or organization as a whole.

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the practice of taking someone else's work or ideas and passing them off as one's own.

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A trademark is a brand name. A trademark or service mark includes any word, name, symbol, device, or any combination, used or intended to be used to identify and distinguish the goods/services of one seller or provider from those of others, and to indicate the source of the goods/services.

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Ethics is about the moral principles that people work with. Societies, countries, groups all have ways of deciding what is right and wrong. 'Correctness' or acceptable conduct is one of the outcomes of ethics.

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a controlled technique of lighting, used in photography or the theater, in which a light is placed behind or at right angles to an object, person, or scene to produce such effects as depth or separation of subject and background.

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Sunlight on a clear day is direct light. Light from an on-camera flash can also be direct light. While direct light has many uses, photographers often prefer the softer look of diffused and reflected light.

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Ambient light means the light that is already present in a scene, before any additional lighting is added. It usually refers to natural light, either outdoors or coming through windows etc.

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Chiaroscuro is an Italian artistic term used to describe the dramatic effect of contrasting areas of light and dark in an artwork, particularly paintings. It comes from the combination of the Italian words for "light" and "dark."

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Silhouette photography is a wonderful way to convey drama, mystery, emotion and mood in a picture. A silhouette is defined as a view of an object or a scene consisting of the outline and a featureless interior, with the silhouetted object usually being black.

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A file format is the structure of how information is stored (encoded) in a computerfile. File formats are designed to store specific types of information, such as JPEG and TIFF for image or raster data, AI (Adobe Illustrator) for vector data, or PDF for document exchange.

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The DNG file format is, by design, meant to create a universal standard for raw image files, or digital negatives. When raw files from your camera are converted to DNG, they are converted to a universal standard through a process that Adobe has developed to best interpret the data in your CR2 (or NEF, etc.) files.

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A .PSD file is a layered image file used in Adobe PhotoShop. PSD, which stands for Photoshop Document, is the default format that Photoshop uses for saving data.  PSD is a proprietary file that allows the user to work with the images’ individual layers even after the file has been saved.

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The JPEG file extension is used interchangeably with JPG. JPEG stands for Joint Photographic Experts Group who created the standard. JPG files have 2 sub-formats, JPG/Exif (often used in digital cameras and photographic equipment), and JPG/JFIF (often used on the World Wide Web).

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aged Image File Format, abbreviated TIFF or TIF, is a computer file format for storing raster graphics images, popular among graphic artists, the publishing industry, and photographers. ... The format was created by Aldus Corporation for use in desktop publishing.

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Diptych and triptych come from the Greek meaning two (dip) or three (trip) fold (tych). This usually referred to a work of art that was divided into sections and hinged together but has come to be something that is widely used in photography and the art world.

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Basically Triptych photography is a photograph that uses three different or identical images side by side to form one single image.

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The word “pixel” means a picture element. Every photograph, in digital form, is made up of pixels. They are the smallest unit of information that makes up a picture. Usually round or square, they are typically arranged in a 2-dimensional grid.

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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. The opposite period during twilight is blue hour, just before sunrise or after sunset, when indirect sunlight is evenly diffused.

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Blue hour photography or blue light photography is the process of taking photographs during the time of the day that is known as the blue hour. The blue hour occurs before sunrise in the morning and after sunset in the evening. The sun has dipped a certain amount below the horizon.