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发表于 22-12-2007 12:24 AM
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原帖由 lonely_wolf 于 20-12-2007 09:18 AM 发表
怎么讲是拍成4:3比例和拍成3:2比例呢?
The first thing to recognise here is that digital cameras take pictures at a different ratio to traditional film cameras. Digital cameras were orginally designed to capture images for computer monitors, and as you probably know, these have dimensions typically like 640 x 480 and 800 x 600. If you divide the height by the width, you will find that the ratio is 4:3.
[size=-2]
A traditional camera takes pictures that fit perfectly into a 6x4" photo. If you again divide the height by the width, you find that this is a different ratio, 3:2. So whats the problem you ask? Nothing really, but you have a decision to make when you come to print your photos. The standard photo sizes, and frames were designed for film and the 3:2 ratio. See our article on cropping for a visual description of the issue.
4×6 | 3:2 | 1.5 | Display: 720×480 pixels
Photo: 24×36 mm full-frame 35 mm format, 40×60 mm 127 format, 56×84 mm 120/620/220 format, APS-C aspect
Print: A7 with 6 mm border, 3½"×5" with ¼" border", 4"×6", 5"×7½", 8"×12", 10"×15", 12"×18", 18"×27"
Video: NTSC standard-definition DVD format with 720×480 pixels, NTSC low-definition DVD format with 360×240 pixels |
3×4 | 4:3 | 1.333333 | Cinema: 1"×¾" 1894 Edison Kinetoscope 35 mm format
Display: 320×240 pixels, 480×360 pixels, 640×480 pixels, 800×600 pixels, 832×624 pixels, 1024×768 pixels, 1152×864 pixels, 1280×960 pixels, 1400×1050 pixels, 1600×1200 pixels, 1920×1440 pixels pixels
Photo: 4:3 digital camera aspect ratio, 24×18 mm half-frame 35 mm format, 40×30 mm 127 format, 56×42 mm 120/620/220/645 format, 56.4×75.2 mm 120/620/220 format
Print: 1½"×2", 3"×4", 6"×8", 8½"×11" with ½" border, 12"×16", 15"×20", 30"×40", 30"×40"
Video: NTSC standard-definition television aspect ratio |
[ 本帖最后由 edneoh 于 22-12-2007 12:29 AM 编辑 ] |
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