Digital Photography. ISO Light Sensitivity.
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Transcript of Digital Photography. ISO Light Sensitivity.
![Page 1: Digital Photography. ISO Light Sensitivity.](https://reader035.fdocuments.net/reader035/viewer/2022062314/56649db55503460f94aa6d44/html5/thumbnails/1.jpg)
DigitalPhotography
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ISO
Light SensitivityLight Sensitivity
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What ISO denotes is how What ISO denotes is how sensitive the image sensor is to sensitive the image sensor is to the amount of light present. The the amount of light present. The higher the ISO, the more higher the ISO, the more sensitive the image sensor and sensitive the image sensor and therefore the possibility to take therefore the possibility to take pictures in low-light situations.pictures in low-light situations.
http://www.photoxels.com/tutorial_iso.html
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However, all this increase in However, all this increase in sensitivity does not come free. sensitivity does not come free. There is a price to pay with your There is a price to pay with your image appearing more noisy.image appearing more noisy.
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An image sensor is usually calibrated An image sensor is usually calibrated so that it gives the best image quality so that it gives the best image quality (greatest S/N ratio) at its (greatest S/N ratio) at its lowestlowest possible ISO speed. For most possible ISO speed. For most consumer digital cameras, this value consumer digital cameras, this value will be expressed as ISO 50, ISO 64 will be expressed as ISO 50, ISO 64 or ISO 100. A few digital cameras use or ISO 100. A few digital cameras use ISO 200 as their lowest ISO speed.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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WebSmall size: 640 x 480Small size: 640 x 480
DPI: 72 – 96DPI: 72 – 96
Colorspace: sRGBColorspace: sRGB
Photos: JPEGPhotos: JPEG
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PowerpointSize: 1024 x 768Size: 1024 x 768
DPI: 144DPI: 144
Colorspace: sRGBColorspace: sRGB
Photos: JPEGPhotos: JPEG
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NewspaperLargest sizeLargest size
Colorspace: Adobe1998Colorspace: Adobe1998
Include caption Include caption informationinformation
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Organization
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Store all images in one main folder on you computer
2008_photo_archives_sp2008_photo_archives_sp
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Name folders with date
20080123central_ext_job20080123central_ext_job
20080131east_ext_job20080131east_ext_job
20080204west_ext_job20080204west_ext_job
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Name all files the same way
20080123central_ext00120080123central_ext001
20080123central_ext00220080123central_ext002
20080123central_ext00320080123central_ext003
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2008_photo_archives_sp2008_photo_archives_sp20080123central_ext_job20080123central_ext_job
20080123central_ext00120080123central_ext00120080123central_ext00220080123central_ext00220080123central_ext00320080123central_ext003
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Archives
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Always have a backup
External harddriveExternal harddrive Network with automatic Network with automatic
backupbackup CDs and DVDs are NOT CDs and DVDs are NOT
reliablereliable
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Photography
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Good Composition
A pleasing arrangement of A pleasing arrangement of objects, mass, lines and objects, mass, lines and
contrasts of colors to form a contrasts of colors to form a harmonious wholeharmonious whole
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3 Essentials of a good photograph
Good Technical QualityGood Technical Quality Interest or ImpactInterest or Impact Good CompositionGood Composition
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Good Technical Quality No camera movementNo camera movement
Correct body positionCorrect body position Correct focusCorrect focus
Person’s eyesPerson’s eyesSelective/depth of fieldSelective/depth of field
LightingLightingFront, back, sideFront, back, side
ExposureExposure
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Interest or Impact Tell a storyTell a story Express a moodExpress a mood Make a patternMake a pattern
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S C U F I
Shoot
Close
Up
For
Impact
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Good Composition Get closerGet closer Rule of ThirdsRule of Thirds Vantage pointVantage point Framing movementFraming movement
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Keys to Success Keep it simpleKeep it simple Try vertical & horizontalTry vertical & horizontal Place subject off-centerPlace subject off-center Try unusual points of viewTry unusual points of view
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Ten Tips for Better Pictures
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1.1. Get close to the subjectGet close to the subject2.2. Keep people busyKeep people busy3.3. Place the subject off-centerPlace the subject off-center4.4. Use a simple backgroundUse a simple background5.5. Find unusual viewpointsFind unusual viewpoints6.6. Look for dramatic lightingLook for dramatic lighting7.7. Include the foreground to add depth Include the foreground to add depth
to scenic photosto scenic photos8.8. Keep your camera readyKeep your camera ready9.9. Take extra pictures of good Take extra pictures of good
subjectssubjects10.10. Read your manualRead 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
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http://www.ca.uky.edu/agc/econf08