These definitions are in the context of cameras with interchangeable lenses and are relevant only to that context. The terms may thus have other meanings that are not discussed here.

35mm. The most popular film format in history; 35 mm in width. Still frame images are usually 24 mm by 36 mm in size.

aberration. Any deviation of a lens, from a theoretical ideal that results in diminished performance or a loss of optical quality.

advanced amateur. Describes a midrange product aimed at the enthusiast who can’t afford high-end professional gear but who wants better build and optical quality than that provided by a consumer device.

anamorphic. A technology used for making movies. Allows wide-screen films to be recorded onto regular 35mm film. ...

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