This photograph of a sunset taken in the Thousand Islands region demonstrates the principles of the rule of thirds
The rule of thirds is a compositional rule of thumb in photography. Image File history File links Rivertree_thirds_md. ... Sunset over one of the smallest islands. ... A rule of thumb is an easily learned and easily applied procedure for approximately calculating or recalling some value, or for making some determination. ... Photography is the process of making pictures by means of capturing light on a light-sensitive medium, such as a sensor or film. ...
Photography Portal
The rule states that an image can be divided into nine equal parts by two equally-spaced horizontal lines and two equally-spaced vertical lines. The four points formed by the intersections of these lines can be used to align features in the photograph. Proponents of this technique claim that aligning a photograph with these points creates more tension, energy and interest in the photo than simply centering the feature would. Image File history File links Large_format_camera_lens. ... This article or section does not adequately cite its references or sources. ...
The photograph to the right demonstrates the application of the rule of thirds. The horizon sits at the horizontal line dividing the lower third of the photo from the upper two-thirds. The tree sits at the intersection of two lines, sometimes called a power point. Points of interest in the photo don't have to actually touch one of these lines to take advantage of the rule of thirds. For example, the brightest part of the sky near the horizon where the sun recently set does not fall directly on one of the lines, but does fall near the intersection of two of the lines, close enough to take advantage of the rule.
The application of the rule of thirds to photographs is considered by many to make them more aesthetically pleasing and professional-looking. The rule of thirds can be applied by lining up subjects with the guiding lines, placing the horizon on the top or bottom line instead of the center, or allowing linear features in the photograph to flow from section to section. In addition, many photographers recommend treating any "rule" of composition as more of a guideline, since pleasing photographs can often be made while ignoring one or more such rules. Aesthetics (or esthetics) (from the Greek word αισθητική) is a branch of philosophy dealing with the nature of beauty. ...
The rule of thirds can be applied by lining up subjects with the guiding lines, placing the horizon on the top or bottom line instead of the center, or allowing the subject(s) to flow from section to section, as is done with the example photograph.
Rules of thumb such as the right hand rule in electrodynamics are also used as mnemonic devices.
Tailors' Rule of Thumb - A simple approximation that was used by tailors to determine the wrist, neck, and waist circumferences of a person through one single measurement of the circumference of that person's thumb.
The rule states, typically, that twice the circumference of a person's thumb is the circumference of their wrist, twice the circumference of the wrist is the circumference of the neck, and twice around the neck is the person's waist.