digital photography. iso light sensitivity

Download Digital Photography. ISO Light Sensitivity

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  • Slide 1
  • Digital Photography
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  • ISO Light Sensitivity
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  • What ISO denotes is how sensitive the image sensor is to the amount of light present. The higher the ISO, the more sensitive the image sensor and therefore the possibility to take pictures in low-light situations. What ISO denotes is how sensitive the image sensor is to the amount of light present. The higher the ISO, the more sensitive the image sensor and therefore the possibility to take pictures in low-light situations. http://www.photoxels.com/tutorial_iso.html
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  • However, all this increase in sensitivity does not come free. There is a price to pay with your image appearing more noisy. However, all this increase in sensitivity does not come free. There is a price to pay with your image appearing more noisy.
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  • An image sensor is usually calibrated so that it gives the best image quality (greatest S/N ratio) at its lowest possible ISO speed. For most consumer digital cameras, this value will be expressed as ISO 50, ISO 64 or ISO 100. A few digital cameras use ISO 200 as their lowest ISO speed. An image sensor is usually calibrated so that it gives the best image quality (greatest S/N ratio) at its lowest possible ISO speed. For most consumer digital cameras, this value will be expressed as ISO 50, ISO 64 or ISO 100. A few digital cameras use ISO 200 as their lowest ISO speed.
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  • Optimum Camera Settings
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  • Quality
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  • Compression
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  • Lossy Compression (Destructive)
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  • Control Freak?
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  • RAW
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  • What size should you make your images?
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  • It Depends!
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  • Web Small size: 640 x 480 DPI: 72 96 Colorspace: sRGB Photos: JPEG
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  • Powerpoint Size: 1024 x 768 DPI: 144 Colorspace: sRGB Photos: JPEG
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  • Newspaper Largest size Colorspace: Adobe1998 Include caption information
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  • Organization
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  • Store all images in one main folder on you computer 2008_photo_archives_sp
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  • Name folders with date 20080123central_ext_job20080131east_ext_job20080204west_ext_job
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  • Name all files the same way 20080123central_ext00120080123central_ext00220080123central_ext003
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  • 2008_photo_archives_sp 2008_photo_archives_sp 20080123central_ext_job 20080123central_ext001 20080123central_ext002 20080123central_ext003
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  • Archives
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  • Always have a backup External harddrive External harddrive Network with automatic backup Network with automatic backup CDs and DVDs are NOT reliable CDs and DVDs are NOT reliable
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  • Photography
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  • Good Composition A pleasing arrangement of objects, mass, lines and contrasts of colors to form a harmonious whole
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  • What makes a good photograph?
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  • You Be the Judge
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  • 3 Essentials of a good photograph Good Technical Quality Good Technical Quality Interest or Impact Interest or Impact Good Composition Good Composition
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  • Good Technical Quality No camera movement No camera movement Correct body position Correct focus Correct focus Persons eyes Selective/depth of field Lighting Lighting Front, back, side Exposure Exposure
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  • Interest or Impact Tell a story Tell a story Express a mood Express a mood Make a pattern Make a pattern
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  • S C U F I Shoot Close Up For Impact
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  • Good Composition Get closer Get closer Rule of Thirds Rule of Thirds Vantage point Vantage point Framing movement Framing movement
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  • Keys to Success Keep it simple Keep it simple Try vertical & horizontal Try vertical & horizontal Place subject off-center Place subject off-center Try unusual points of view Try unusual points of view
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  • Ten Tips for Better Pictures
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  • 1. Get close to the subject 2. Keep people busy 3. Place the subject off-center 4. Use a simple background 5. Find unusual viewpoints 6. Look for dramatic lighting 7. Include the foreground to add depth to scenic photos 8. Keep your camera ready 9. Take extra pictures of good subjects 10. Read your manual
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  • 1. Get close to the subject
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  • 2. Keep people busy
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  • 3. Place the subject off-center
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  • 4. Use a simple background
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  • 5. Find unusual viewpoints
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  • 6. Look for dramatic lighting
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  • 7. Include the foreground to add depth to scenic photos
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  • 8. Keep your camera ready
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  • 9. Take extra pictures of good subjects
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  • 10. Read your manual
  • Slide 93
  • http://www.ca.uky.edu/agc/econf08

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