Typically found in higher-end camera lenses geared toward professional photographers.Īstrophotography. Compared to a traditional non-aspheric lens, the more complex shape of aspherical lenses allows light rays to more precisely converge onto a single focal point, reducing various types of optical aberrations. A type of optical lens in which the surface curves are not portions of a sphere. Common aspect ratios found in film and digital photography include 4:3, 3:2, 16:9, 5:3, 5:4, and 1:1.Īspherical Lens. Typically expressed as the two numbers separated by a colon. The ratio of an image’s width compared to its height.
#Watermark sense handle iso#
In 1974, ASA and DIN were combined into the ISO standards used by photographers today.Īspect Ratio. The private non-profit organization has since been renamed to American National Standards Institute (ANSI). The standards body that defined the ASA system for rating the speed sensitivity of photographic emulsions. Short for American Standards Association. Can refer to data storage technologies for digital images or paper, ink, and storage qualities for photographic prints.ĪSA. The quality and ability of a photo to remain unchanged in appearance for an extended period of time. Not commonly found in modern digital cameras, APS-H has a crop factor of about 1.25x or 1.3x compared to standard 35mm film.Īrchival. It measures 30.2×16.7mm with an aspect ratio of 16:9. Advanced Photo System type-H is a format for digital sensors that is based on the dimensions of Advanced Photo System (APS) film negative in its High Definition (H) format. Commonly found in digital cameras, the format is smaller than standard 35mm film, so it is known as a “cropped frame” sensor, usually with a crop factor of 1.5x or 1.6x.ĪPS-H. It measures 25.1×16.7mm with an aspect ratio of 3:2. Advanced Photo System type-C is a format for digital image sensors that is roughly the same dimensions as the Advanced Photo System (APS) film negative in its Classic (C) format.
#Watermark sense handle tv#
While APEX failed to become a fundamental standard in the camera industry, its use of Av and Tv to refer to aperture and shutter speed live on in modern cameras.ĪPS-C. A system for simple exposure computation first proposed in the 1960 ASA standard regarding monochrome film speed. Short for Additive System of Photographic Exposure. A camera exposure mode in which the photographer sets the aperture and the camera automatically sets the shutter speed in order to achieve optimal exposure based on lighting conditions detected by the built-in light meter.ĪPEX. Usually measured and expressed as a number known as the f-number of f-stop.Īperture Priority. This is one of the fundamental settings for controlling exposure and a component of the Exposure Triangle. The opening of the diaphragm within a lens that light passes through on its way into a camera. This can include both natural light from the Sun as well as artificial light already illuminating a location.Īngle of View (AOV). Any light in a scene that the photographer did not introduce artificially.
Autofocus lock is a camera feature that allows a photographer to freeze the current focus point of the lens, enabling them to shoot a photo at any time independent of whether the camera determines it has achieved correct focus.Īmbient Light.
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