Canon EOS-1D C Digital Photo Professional Ver.4.1 for Macintosh Instruction Ma - Page 70
Effects of Distortion Correction for Fisheye, Lenses, Shot settings, Emphasize Linearity - camera body only
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Effects of Distortion Correction for Fisheye Lenses Shot settings By selecting this option, only the aberration corrections will be performed to correct the optical distortions. Emphasize Linearity This converts the image to a "central projection" style image. This projection method is employed for general lenses. Since central projection displays straight lines as straight lines, a wide-view panoramic image can be obtained by selecting this option. However, the periphery is stretched, resulting in decreased resolution. Emphasize Distance This converts the image to an "equidistant projection" style image. This projection method preserves distance relationships. Equidistant projection displays a distance in the same distance anywhere from the center to the periphery. In particular, when shooting a celestial body such as the celestial sphere, same heights above the horizon(declination) are captured at the same heights. This method is therefore used in such photography as celestial photography (star maps, solar path diagrams, etc.). Emphasize Periphery This converts the image to a "stereographic projection" style image. This projection method emphasizes the periphery. Stereographic projection allows position relationships on a spherical surface, such as N, S, E, W on a map, to be displayed correctly. It is therefore used for world maps and monitoring cameras. By selecting this option, the periphery is stretched and may result in decreased resolution. Introduction Contents 1 Downloading Images 2Viewing Images 3Sorting Images 4Editing Images 5Printing Images 6 Processing Large Numbers of RAW Images 7Remote Shooting 8 Specifying Preferences Reference/ Index 69