THE LENS
Click on the image below to learn about different lenses and the angle of view, thanks to better-digital-photo-tips.com !
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HOW DOES THE LENS AFFECT THE PHOTOGRAPH?
lens_choice_angle_of_view.pdf |
Thanks to Cole's Classroom for the info below!
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"ZOOM" and TELEPHOTO LENSESBeginner photographers are often confused by zoom lenses. To many people, a zoom lens is a telephoto lens, since you can “zoom in” on a subject. But in simplest terms, a zoom lens can change focal lengths, while a telephoto lens cannot. A zoom lens can adjust its range to be wide-angle or long telephoto. When most people talk about zooming in on a subject, they generally mean using a longer lens. Telephoto lenses have optical properties that foreshorten perspective, which make them a good choice for portrait lenses. They also have less depth of focus than shorter focal length lenses, which can cause interesting selective-focus effects.
The word telephoto technically applies to a specific design of long focal-length lenses, but the term has broadened and is now essentially synonymous with any long focal-length lens. A long, focal-length lens will narrow the angle of view and cause apparent image magnification. In other words, it brings the subject closer. |
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PORTRAIT LENSES
A lens that captures a person’s head and shoulders is called a portrait lens. Typically, a portrait photographer will choose a short telephoto lens in the 85mm or 105mm range. While a normal or wide-angle lens can also be used, the slight foreshortening of the narrower angle of view, coupled with the ability to blur the background makes the short telephoto lens perfect for a head and shoulders portrait.
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LANDSCAPE LENSESAs with the portrait lens, a landscape lens can be of any focal length. But for those majestic, sweeping vistas we seek out while traveling cross country, many photographers gravitate towards shorter focal-length lenses, preferring their wider angle. With a wide-angle lens, more of the scene can fit into the image area, and it’s easier to create an impressive depth of field.
What is the focal length of a landscape lens? The wider the angle, the more scenery we can fit into the frame. Therefore, focal lengths such as 20mm, 24mm, and 28mm are common choices, though a normal lens can also work. |