06_Cameras and Composition

06_Cameras and Composition - Lecture overview Classical...

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ameras and Composition Cameras and Composition Digital Lighting and Rendering GT 340 CGT 340 Bedrich Benes, bbenes@purdue.edu ecture overview Lecture overview lassical still camera 9 Classical still camera ~ elements, field of view, depth of view irtual camera 9 Virtual camera ~ special features (clipping planes, etc) 9 Composition ~ focus, symmetry, texture, form, shots,… 9 Aspect ratio Bedrich Benes, bbenes@purdue.edu lassical Still Camera Classical Still Camera arts of a camera Parts of a camera 9 Lens onverges light to form an inverted image Converges light to form an inverted image. 9 Focal Distance (focal length) from the lens to the Focal point Bedrich Benes, bbenes@purdue.edu lassical Camera Classical Camera Bedrich Benes, bbenes@purdue.edu
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lassical Still Camera Classical Still Camera hutter 9 Shutter Device that opens and closes control when light is to control when light is let into the system. Bedrich Benes, bbenes@purdue.edu lassical Still Camera Classical Still Camera 9 perture Aperture controls the amount of light that enters the system. 9 F-stops units of aperture F1.4 wide opening F64 small opening F1.4,2,2.8,4,5.6,8,11,16, 22, 32,45,64 Bedrich Benes, bbenes@purdue.edu lassical Still Camera Classical Still Camera ocal Plane 9 Focal Plane (film, CCD) Area where the light ys converge to form an image rays converge to form an image. Bedrich Benes, bbenes@purdue.edu imilarity? Similarity? Bedrich Benes, bbenes@purdue.edu
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ield of View Field of View he Field of View 9 The Field of View depends upon the Focal Length. maller have larger Fields of View 9 Smaller have larger Fields of View. (FOV is measured in degrees. Focal Length is measured in mm.) g) 9 Wide angle anything below 50 mm The effects of perspective is Bedrich Benes, bbenes@purdue.edu more extreme ield of View Field of View elephoto 9 Telephoto anything more that 50 mm essens the effects of perspective Lessens the effects of perspective (flattens image) 9 85 mm is called a Portrait lens 9 Macro very close view Bedrich Benes, bbenes@purdue.edu ield of View Field of View Bedrich Benes, bbenes@purdue.edu ield of View Field of View Bedrich Benes, bbenes@purdue.edu
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ield of View Field of View Bedrich Benes, bbenes@purdue.edu ield of View Field of View Bedrich Benes, bbenes@purdue.edu epth of Field Depth of Field he distance between the nearest point 9 The distance between the nearest point and the farthest point in the subject which perceived as acceptably sharp is perceived as acceptably sharp. 9 Most subjects it extends one third of the istance in front of and two thirds behind distance in front of and two thirds behind the point focused on. 9 shorter focal length ~ greater depth of field Small f-stop – shallow DOF Bedrich Benes, bbenes@purdue.edu epth of Field Depth of Field Bedrich Benes, bbenes@purdue.edu
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epth of Field Depth of Field Bedrich Benes, bbenes@purdue.edu epth of Field Depth of Field CCD large f-stop mall dot small dot Bedrich Benes, bbenes@purdue.edu epth of Field Depth of Field CCD small f-stop mall dot
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06_Cameras and Composition - Lecture overview Classical...

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