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Related articles:
Angle of view
Dioptre
F-number
Lens (optics)
Telephoto lens
Magnification
Photographic lens
Optics
Wide-angle lens
Focus (optics)
Depth of field
Digital camera
Key terms: lens math mm optical distance focal length plane frac camera rear focus objects front size mirror normal surface angle of view lenses concave negative text radius of curvature value convex distant positive front focal optical power focal distance n r images sign convention effective focal length focal plane back focal rear nodal point magnification distance from the front print sensor lens must medium photography vertex diagonal shorter focal normal lens focal length of a lens equal Search external links cited by footnotes on Wikipedia page Focal length: |
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