Posted by Nigel Goldsmith on Thursday 06 May 2010 at 7:52am
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We have just released a new introductory document on lenses, it describes the main components of the lens and what you should consider before choosing a lens for a task.
The document also explains focal length, aperture size and depth of field and how they contribute to the appearance of the picture. It also contains some frequently asked questions on the subject.
Read our Introduction to Lenses.

Camera lenses fitted with lens hood to reduce the risk of lens flare.
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