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  2. Astrophotography - Wikipedia

    en.wikipedia.org/wiki/Astrophotography

    A rule of thumb called the 500 rule states that, to keep stars point-like, Maximum exposure time in seconds = ⁠ 500 / Focal length in mm × Crop factor ⁠ regardless of aperture or ISO setting. [24] For example, with a 35 mm lens on an APS-C sensor, the maximum time is ⁠ 500 / 35 × 1.5 ⁠ ≈ 9.5 s.

  3. Headroom (photographic framing) - Wikipedia

    en.wikipedia.org/wiki/Headroom_(photographic...

    Headroom refers specifically to the distance between the top of the subject's head and the top of the frame, but the term is sometimes used instead of lead room, nose room or 'looking room' [1] to include the sense of space on both sides of the image. The amount of headroom that is considered aesthetically pleasing is a dynamic quantity; it ...

  4. Rule of thirds - Wikipedia

    en.wikipedia.org/wiki/Rule_of_thirds

    The rule of thirds is a rule of thumb for composing visual art such as designs, films, paintings, and photographs. [3] The guideline proposes that an image should be imagined as divided into nine equal parts by two equally spaced horizontal lines and two equally spaced vertical lines, and that important compositional elements should be placed ...

  5. Composition (visual arts) - Wikipedia

    en.wikipedia.org/wiki/Composition_(visual_arts)

    Space is the area around, above, and within an object. Photographers can capture space, architects build space, and painters create space. This element is found in each of the visual arts. It can be positive or negative, open or closed, shallow or deep, and two-dimensional or three-dimensional.

  6. Lead room - Wikipedia

    en.wikipedia.org/wiki/Lead_room

    In photography, filmography and other visual arts, lead room, or sometimes nose room, is the space in front, and in the direction of, moving or stationary subjects. [ 1 ] [ 2 ] Well-composed shots leave space in the direction the subject is facing or moving. [ 1 ]

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  8. Rabatment of the rectangle - Wikipedia

    en.wikipedia.org/wiki/Rabatment_of_the_rectangle

    Rabatment of the rectangle is a compositional technique used as an aid for the placement of objects or the division of space within a rectangular frame, or as an aid for the study of art. Every rectangle contains two implied squares, each consisting of a short side of the rectangle, an equal length along each longer side, and an imaginary ...

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