A Short Course in Digital Photography: Chapter 2 - Notes
The Lens
Most photographers describe lenses in terms of 'focal length'
The shorter the focal length of an image, the more of a scene the lens takes in and the smaller it makes each object in the scene appear in the image
Normal Lens - 50mm = produces image most similar to image captured by human eye
Telephoto Lens - 2x = magnifies, little depth of field
Wide-Angle Lens - 28mm = broadens depth of field, sometimes distorts subjects
Other Lenses: Fisheye, Zoom, Macro
Depth of Field: Determined by focal length, aperture size, and lens-to-subject distance
- greatest depth of field given by: smallest aperture setting, shortest focal length, furthest distance from subject
- least depth of field given by: biggest aperture setting, longest focal length, shortest distance from subject
Most photographers describe lenses in terms of 'focal length'
The shorter the focal length of an image, the more of a scene the lens takes in and the smaller it makes each object in the scene appear in the image
Normal Lens - 50mm = produces image most similar to image captured by human eye
Telephoto Lens - 2x = magnifies, little depth of field
Wide-Angle Lens - 28mm = broadens depth of field, sometimes distorts subjects
Other Lenses: Fisheye, Zoom, Macro
Depth of Field: Determined by focal length, aperture size, and lens-to-subject distance
- greatest depth of field given by: smallest aperture setting, shortest focal length, furthest distance from subject
- least depth of field given by: biggest aperture setting, longest focal length, shortest distance from subject
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