Photography - Depth of Field
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Transcript of Photography - Depth of Field
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Copyright Aladin Abdel Naby
FocusFocus
Slightly out of focus
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Sharp and in focusSharp and in focus
Slightly out of focusSlightly out of focus
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Depth of fieldDepth of field
Depth of Field is always in effect on the lens axisDepth of Field is always in effect on the lens axis
CameraCamera
ObjectObject
AxisAxis Depth of Field /Depth of Field /
TableTable
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LensLens \\ :: 5050
F /F / 2.82.8
LensLens \\ :: 5050
F /F / 88
LensLens \\ :: 5050
F /F /1616
MM
MM
MM
AxisAxis
11 22 33 44 6655 77
11 22 33 44 6655 77
11 22 33 44 6655 77
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ObjectObject
DistractionDistraction
What is the picture?What is the picture?
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Center of focusCenter of focus
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S: 1/160 f/16S: 1/160 f/16 1601601616
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S: 1/160 f/2.8S: 1/160 f/2.8 1601602.82.8
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The wider the aperture = the smaller the DOFThe wider the aperture = the smaller the DOF
The narrower the aperture = the bigger the DOFThe narrower the aperture = the bigger the DOF
Aperture and DOFAperture and DOF
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Copyright Aladin Abdel Naby
Lenses and DOFLenses and DOF
The wider the lens = the bigger the DOFThe wider the lens = the bigger the DOF
== The longer the lens = the smaller the DOFThe longer the lens = the smaller the DOF==
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300 mm lens very short DOF300 mm lens very short DOF
300300
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A 75A 75--250mm lens250mm lens 7575--250250
Focal length 75mm at f/22Focal length 75mm at f/22 75752222
3.403.401010
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A 75A 75--250mm lens250mm lens 7575--250250
Focal lengthFocal length 250250 mm at f/22mm at f/22 2502502222
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7575 mmmm250 mm250 mm
Difference between the 75 and 250mm DOFDifference between the 75 and 250mm DOF
7575250250
f/22f/22 at 5 meter focusat 5 meter focus
55 2222
DOF is from 3.4 to 10 metersDOF is from 3.4 to 10 meters
3.43.41010DOF is fromDOF is from 4.84.8 toto 5.25.2 metersmeters
4.84.85.25.2
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Hyperfocal distanceHyperfocal distance