Photo Basics: Lenses
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For simplicity, we can refer to lenses with short focal lengths (less than 50mm) as wide-angle lenses. Lenses with longer focal lengths (more than 50mm) are called telephoto lenses. Zoom lenses offer a range of focal lengths in a single lens for convenience.

Wide-angle lens Focal length: 28mm	Standard lens Focal length: 50mm	Telephoto Lens Focal length: 200mm
Angle of view is wide, the subject appears smaller.	A 50mm lens simulates the viewing angle of the human eye.	Angle of view is narrow, the subject fills the frame.
Characteristics: Exaggerates perspective. Foreground objects look larger, background objects look smaller. High depth-of-field.	Characteristics: Natural perspective. Medium depth-of-field	Characteristics: Flattens perspective. Background objects look larger. Low depth-of-field.

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~~~ About the Contributor ~~~

Andy Lim got started in photography after leaving design college in 1992, at first with travel and landscapes and later weddings and commercial assignments. Andy has given several public talks on the subject of photography, and currently conducts photography classes for beginners to advanced. Andy Lim has over 17 years of professional experience in the art of visual communication, yet is self-taught in the areas of photography, web design, technology and optimization.

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