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ppt about photography

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ppt about photography

  1. 1. COMPUTER ASSISNMENT PPT ABOUT PHOTO GRAPHY DONE BY: J. HARSHAN IX-B2
  2. 2. Digital photography uses an array of electronic photodetectors to capture the image focused by the lens, as opposed to an exposure on photographic film. The captured image is thendigitized and stored as a computer file ready for digital processing, viewing, digital publishing or printing. Until the adventof such technology, photographs were made byexposing light sensitivephotographic film, and used chemical photographic processing to develop and stabilize the image. By contrast, digital photographs canbe displayed, printed, stored, manipulated, transmitted, and archived using digital and computer techniques, without chemical processing. Digital photography is oneof several forms of digital imaging. Digital images are also createdby non-photographic equipment such as computer tomography scanners and radio telescopes. Digital images can also bemade by scanning otherphotographic images Digital photography
  3. 3. Choosing theBest Camera •Nota once in a lifetimepurchaseanymore. •Selectone which can do the job you want Today and asperyour futurerequirement •Somekindsof camerasdo. somekinds of thingsbetter ormoreeasily e.g., Sportsphotography vs. Close-upportraits. •Priceisn’tthe bestindicator.
  4. 4. TYPES OF CAMERAS • WEB CAMERAS AND MOBILE CAMERAS
  5. 5. • POINT AND SHOOTCAMERAS
  6. 6. • ADVANCEDCONSUMERMODEL
  7. 7. • PROSUMERDslrmodels
  8. 8. • Professional cameras
  9. 9. RESOLUTION AND PRINT SIZES Resolution Avg. quality Best quality Resolution 0.5 megapixels 3x5 in. N/A 800 x 600 2 megapixels 8x10 in. 3x5 in. 1600 x 1200 4 megapixels 11x14 in. 5x7 in. 2300 x 1700 6 megapixels 16x20 in. 8x0 in. 3000 x 2000 10+megapixels 25x40 in. 13x17 in. 3888+ x 2592+
  10. 10. PHOTOGRAPHY TECHNICALITY Anti-Blur Anti-Shake Image Stabilization Vibration Reduction •A technology that stabilizes the lens to effectively reduce blur due to camera shake
  11. 11. HISTOGRAM
  12. 12. METERING How thecamera measuresthe amount of light availableto exposea picture •Centre-Weighted:Readingsaretakenat variouspart of the picture, witha special emphasisfor the centre. •Spot: Readingsare takenat a specificpoint. •Each cameramanufacturerhas itsown variations(EvaluativeMetering)
  13. 13. WHITE BALANCE Theabilitytoadjustcoloursbasedonwhiteas a reference colourtogiveas truea whiteas possible •Allothercoloursare correctedaccordingly •AutoWB(AWB): thecamera determinesand selectsthecorrectcolourtemperaturefor white.
  14. 14. WHITE BALANCE Somepreset white balance settings are daylight, cloudy, tungsten, or fluorescent.
  15. 15. Aperture, Depthof Field,Shutter Speed, ISO, Noise APERTURE a hole or an opening through which light travels It causes variations in the Depth of Field within the image
  16. 16. f16 f2.8
  17. 17. Shutter Speed •Amount of time the picture is exposed •Short/Fast shutter speed •Long/Slow shutter speed
  18. 18. 1/8th
  19. 19. 1/30th
  20. 20. 1/60th
  21. 21. 1/500th
  22. 22. RESULTS OF VARYING SHUTTER SPEED
  23. 23. Which shutter speed is the best
  24. 24. ISO 100
  25. 25. ISO 1600
  26. 26. Shutter Priority Shutter Priority: Allows you to decidethe shutter speed(e.g.fast at 1/500 sec.for stop action photography, or slow at 2 sec.for night photography), and the camera decides the best aperture.
  27. 27. Aperture Priority Aperture Priority: Allows you to choose the aperture (e.g. large at F1.8 for portrait, of small at F16 for landscapes).
  28. 28. Manual You have complete creative control in selecting both the shutter and aperture.
  29. 29. Auto Alldigital cameras usuallyhave an Auto mode: the camera decides for you the best shutter speed/aperture settings.
  30. 30. Landscape photography Primary function isto allow a large depth of field. Landscape mode tells the camera to default to a large Depth of Field (Small Aperture)–f16.
  31. 31. Portrait Photography This mode is notwell suited for full-length portraits orgroups of people Portrait mode tells the camera to default to a: •Small Depth of Field (Large Aperture)– f1.8
  32. 32. Sports/Action Photography tells the camera to default its settings toward capturing images faster This is done by: •Increasing Shutter Speed •Increasing ISO
  33. 33. NightPhotography This preset slows down the shutter speedto allow a lot of light into the camera. •Both the foreground and backgroundof the image are properly exposed. •very useful in taking low-light images where you donot want the background to beblack
  34. 34. EXIF (exchangeable image file) • EXIF (exchangeable image file) data is a record of what camera settings were used to take a photograph. EXIF data stores information like camera model, exposure, aperture, ISO, what camera mode was used ..... To interpret this EXIF data, you will need an EXIF viewer. There are many ways to go about this. Your image processing program should provide that functionality within the program. For beginners, reading an images EXIF data can be a very useful learning tool....
  35. 35. Nightphotography Takeanumberof shotsatdifferentshutterspeed/aperturecombinations. EnsureyourLCDbrightness isset toNormal,notBright, foratruer representationofyourrecordedimage. A goodaperturetostartwithis F4.0 or F5.6 (forgreatestdepthoffield), andadjustshutterspeedupor downuntil you'resatisfiedwiththeshot. Alwaysbringandusea tripod.It's quitecommon tohaveexposuresofan entiresecondor moreduringnight-time photography. Bring alonga flashlight.A pocketflashlightis essential whenyou'redoing photographyatnight.
  36. 36. Minimalisticphotography Minimalisticphotosiscreating‘empty’spacesin thephotograph.... The eye ofthe personlookingatthe imagecan’thelp butbedrawntothe element oftheimage you’vetaken....the subject! “makeyoursubjectthe strongestpointof yourphotoeven thoughit might takeuponlyasmall partoftheoverall image”.... WhenI’m attemptingtotakeashowwith aminimalist feelto itI keep thosewordsin mind. picksubjectswisely experimentwith color usedepthoffield cropoutdistractions Zoom In orout...
  37. 37. 19th century studio camera standing on tripod and using plates Box camera, one of the first mass- produced pocket cameras using film, c. 1900 Compact Kodak folding camera from 1922 Evolution of the camera
  38. 38. Leica-II, one of the first 135 filmcameras, 1932 ContaxS of 1949 – the first pentaprismSL R Polaroid Colorpack 80 instantcamera, c 1975
  39. 39. Digital camera,Canon Ixus class, c.2000. Nikon D1, the first digital SLR used in journalism and sports photography, c.2000 Smartphonewith built- in cameraspreads private images globally, c.2010
  40. 40. THANK YOU THANK YOU FOR U R COOPERATION

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