How digital cameras work

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How digital cameras work by Mind Map: How digital cameras work

1. Exposure is the amount of light hitting the camera's sensor when you take a photo.

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3. Higher f-stop numbers mean a smaller aperture.

4. The amount of detail that the camera can capture is called the resolution

5. All digital cameras have built in computers in them.

6. Doesnt matteer how many mega pixals are in the camera if you are inlarging the photo, only if you are cropping and in larging

7. Aperture is the diameter of the lens opening - a wider aperture means more light gets through

8. it focuses it onto a semiconductor device that records light electronically

9. A computer then breaks the electronic information down into digital data.

10. The amount of detail that the camera can capture is called the resolution


12. High-end consumer cameras can capture over 12 million pixels.

13. each photosite is colorblind. It only keeps track of the total intensity of the light that strikes its surface

14. sensors use filtering to look at the light in its three primary colors.

15. Digital photos are convenient, allow you to see the results instantly

16. digital cameras don't require the costs of film and developing

17. suitable for software editing and uploading to the Internet

18. digital models have taken over the consumer camera market almost completely

19. There are also many additional features available on digital cameras

19.1. including image stabilization

19.2. on-board image editing

19.3. color correction functions

19.4. auto-bracketing and burst modes

20. anyone can take acceptable quality photos with the camera set on full automatic

21. When you're changing the settings on a camera, you're trying to find the proper exposure for the subject and lighting conditions.

22. you will want the exposure set so that the image captured by the camera's sensor closely matches what you see with your eyes.

23. To adjust exposure, you can tweak two different settings: aperture and shutter speed

24. you can play with different exposures for different effects. There are times when auto is better


26. Aperture is the diameter of the lens opening

27. a wider aperture means more light gets through

28. Aperture is measured in f-stops.

29. The aperture setting also affects depth of field, the amount of the photograph that is in focus.

30. Smaller apertures (higher f-stops) give longer depth of field. A person in the foreground and the cars 20 feet behind her could all be in focus with a small enough aperture

31. A larger aperture results in a shallow depth of field, which you normally use for close-up shots and portraits.

32. Shutter speed is the amount of time the shutter remains open to allow light through it

33. a slow shutter speed lets in more light

34. for a clear photo of a moving object, you need a fast shutter speed.

35. Many cameras have a semi-automatic mode that can be set to either aperture priority or shutter priority

36. The camera might also have a variety of modes to choose from

37. experience will let you know what conditions are right for each mode.

38. digital cameras differ in a few important ways.

39. A longer lag time means that it's more difficult to capture a moment

40. Ways to make good photos

40.1. Set your focus ahead of time.

40.1.1. When using auto focus, pressing the shutter release halfway tells the camera to focus in on your target

40.2. Use manual exposure settings.

40.2.1. It takes time for the camera to calculate exposure settings in full automatic mode, so set them manually whenever you can.

40.3. Don't use flash unless it's absolutely necessary.

40.3.1. The time it takes to charge the flash can create additional lag.

40.4. Use the viewfinder instead of the LCD screen.

40.4.1. This will save your batteries and reduce the amount of work the camera has to do.

40.5. Reduce image quality.

40.5.1. Digital cameras allow you to adjust the size and resolution of the photos you are taking. Huge, uncompressed tiff files will look great, but they might create lag.

40.6. Use burst mode.

40.6.1. burst mode is a great way to get the precise moment you're shooting for by taking a series of quick photos over the course of a few seconds.

41. problem with digital cameras is that they tend to need more light than a film camera to create a comparable exposure.

42. slower shutter speeds are often used to get enough light. This can make it very difficult to take a photo without some blurring.

43. The use of a tripod will result in a huge improvement in photo quality.

44. Using the LCD screen to line up your shot can help, but the screens still don't usually show all of what the lens is seeing, and they can make it difficult to focus properly. ­

45. There are several image editing software packages available, and some cameras come with them. You can use these programs to manipulate, crop, combine and print your digital photos.

46. Giving the contrast setting a nudge can really enhance a photograph and create a more dramatic look.

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