50mm "Normal" Lens... Ok, but "Normal" on FF or APS-C Sensor?

Started Nov 10, 2012 | Discussions thread
Detail Man
Detail Man Forum Pro • Posts: 16,688
Re: 50mm "Normal" Lens... Ok, but "Normal" on FF or APS-C Sensor?

jrtrent wrote:

"A focal length approximating the diagonal dimension of the camera’s image plane will render an angle-of-view with negligible magnification—similar to normal human vision. Focal lengths numerically lower than normal will render negative magnification, resulting in wider angles-of-view (wide angle), while those numerically greater than normal render positive magnification, producing narrower angles-of-view (telephoto.)."

It has been my impression that the term "normal" is intended to relate to the ratio of focal length divided by diagonal dimension of film/sensor being close to unity value (1.0), and is otherwise not intimately related to particular characteristics of human visual, or techno-social, perception ...

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