Photo technical - lenses
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This document discusses key factors to consider when choosing a camera lens, including focal length, perspective, and lens type. Focal length determines perspective and angle of view, with higher numbers providing a tighter "zoomed in" view. Lenses around 50mm provide a normal perspective, while wider angles below 50mm and telephoto lenses above 50mm compress or expand the perspective respectively. Zoom lenses allow adjusting the focal length over a range.
Photo technical - lenses
- 1. Lenses How do I choose a lens?
- 2. Focal Length Focal length effects the perspective and angle of view. The greater the focal length number the more zoomed in you are. The focal length of the lens is marked in millimeters on the lens.
- 3. Focal Length
- 4. Perspective How far the foreground and background appear to be separated from one other If objects appear in their normal size relations, the perspective is considered "normal http://www.usa.canon.com/app/html/EFLenses101/focal_length.html
- 5. 50mm rule Lenses with a focal length of approx. 50mm are called normal lenses because they have normal perspective. A 100mm lens has 2x magnification of normal viewing. A 24mm lens has a 遜 magnification of normal viewing.
- 6. Wide Angle A lens that has a small number focal length, a loose perspective and a wider angle of view than a normal lens
- 7. Telephoto A lens that makes a subject appear larger than a normal lens does A telephoto lens has a longer focal length, a compressed perspective and narrower field of view than a normal lens
- 8. Zoom A lens that you adjust the focal length over a wide range of focal lengths