Latest Photographic lens Stories

2012-08-15 23:01:39

America’s top photo retailer offers extra savings through special Canon promotion at Adorama.com, allowing photographers to take full advantage of their DSLRs’ interchangeable lens capability.

2012-08-10 23:00:48

Virtual emporium of photo gadgets and gizmos at Adorama.com features dozens of new products that make perfect gifts for the photographer in everyone’s life Chelsea,

Latest Photographic lens Reference Libraries

2010-09-16 15:48:43

A magnifying glass is a convex lens, usually mounted in a frame with a handle, which is used to produce a magnified image of an object. The glass works by creating a magnified virtual image of an object behind the lens. However, the distance between the lens and the object must be shorter than the focal length for the glass to work. If the distance is not correct then the image will appear small and inverted. Many magnifying glasses are mounted on a stand to insure the proper distance...

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Word of the Day
  • A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.
The word 'pawl' probably comes from a Latin word meaning 'stake'.