From: The perceptual basis of common photographic practice

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Presentation transcript:

From: The perceptual basis of common photographic practice Journal of Vision. 2012;12(5):8. doi:10.1167/12.5.8 Figure Legend: Depth compression and expansion with different focal lengths. (a) Left panel: wide-angle effect (short focal length). This picture was taken with a 16-mm lens (all focal lengths are reported as 35-mm equivalent). The goat looks stretched in depth (©Eliya Selhub; http://www.flickr.com/photos/eliya/2734997796/). Right panel: telephoto effect (long focal length). This picture was taken with a 486-mm focal length. The distance between the pitcher's mound and home plate on an official Major League Baseball field is 18.4 meters. This distance appears compressed (©Mitali Mookerjee; http://www.flickr.com/photos/cool/261259100/). (b) Two stills taken from the movie Goodfellas (Warner Brothers). In this scene, the cinematographer slowly moves from being close up and using a short-focal-length lens to being far away and using a long-focal-length lens, while keeping the actors the same size in the frame. The visual effect is a smooth change from depth expansion to compression (a dolly-zoom shot). The effect is particularly noticeable for the car and buildings seen through the window. (c) Photographs of the same person were taken with focal lengths from left to right of 16, 22, 45, and 216 mm. Lens distortion was removed in Adobe PhotoShop, so the pictures are nearly correct perspective projections. Camera distance wasproportional to focal length, so the subject's interocular distance in the picture was constant. The subject's face appears rounder with a short focal length and flatter with a long focal length. Date of download: 10/23/2017 The Association for Research in Vision and Ophthalmology Copyright © 2017. All rights reserved.