Engineering:Camera lens throat
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A lens throat is the inner diameter of a camera lens mount. It is the width of the opening, measured between two non-obstructed points, i.e., not including the mounting tabs on a bayonet mount.[1]
Canon stated, "Throat size is crucial for determining the angle of incidence and provides us with a more realistic picture of the mount's capabilities."[2]
In an interchangeable lens camera, the combination of the throat diameter and the flange distance affect the angle of incidence. A larger throat and a smaller flange distance make for a larger angle of incidence, allowing for more flexibility in lens design, without requiring retrofocus designs for wider angle lenses.[1]
The elements of a lens elements can have wider diameters with a larger throat diameter, meaning that surface curvature can be less drastic. And with a well-designed lens with lessened surface curvature you get less chromatic aberration.[3]
See also
Note: This topic belongs to "Photography " portal
References
- ↑ 1.0 1.1 Mansurov, Nasim (13 November 2025). "Camera Lens Mounts Explained - Mount Size, Flange Distance and the Angle of Incidence". https://photographylife.com/what-is-lens-mount#throat-size.
- ↑ "Camera Lens Mount Guide - Mount size". Canon. https://en.canon-me.com/get-inspired/tips-and-techniques/choosing-right-lens-mount/.
- ↑ Dozier, Ed (14 November 2018). "Nikon Z Camera Lens Design Brilliance". Photo Art from Science. https://www.photoartfromscience.com/single-post/2018/11/14/nikon-z-camera-lens-design-brilliance.
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