Photographic lens design  From Wikipedia, the free encyclopedia
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The design of photographic lenses for use in still or cine
cameras is intended to produce a lens that yields the most
acceptable rendition of the subject being photographed within a
range of constraints that include cost, weight and materials.
For many other optical devices such as telescopes, microscopes
and theodolite where the visual image is observed but often not
recorded the design can often be significantly simpler than is
the case in a camera where every image is captured on film or
image sensor and can be subject to detailed scrutiny at a later
stage. Photographic lenses also include those used in enlargers
and projectors.   Design requirements[edit]  From the
perspective of the photographer, the ability of a lens to
capture sufficient light so that the camera can operate over a
wide range of lighting conditions is important. Designing a lens
that reproduces colour accurately