All the fancy exposure options a DSLR camera has can be broken down into three things. And these are the only things you must know about it.

1. The Only Three things you Need to know about DSLR A practical guide to exposure Guilherme Zühlke O’Connor twitter.com/guioconnor facebook.com/guioconnorPhoto

2. Once upon a time…

3. Once upon a time… … there was SLR

4. SLR – Single Lens Reflex

5. SLR – Single Lens Reflex A camera with a single lens

6. SLR – Single Lens Reflex A camera with a single lens Use of reflection to send the image to the viewfinder

7. SLR – Single Lens Reflex A camera with a single lens Use of reflection to send the image to the viewfinder

8. Back in the old times…

9. Back in the old times… The body of the camera was responsible for the exposure time

10. Back in the old times… The body of the camera was responsible for the exposure time The lens was responsible for the aperture

11. Back in the old times… The body of the camera was responsible for the exposure time The lens was responsible for the aperture The film was responsible to hold the projected image for eternity (or a sub-period of it)

12. The camera body Tipically, a camera body would be set to expose the film for a period of time ranging from 30 seconds to 1/2000 of a second (but your mileage may vary) http://www.flickr.com/photos/buou/4884738437/

13. The Lens Has a diafragm that controls the area of the aperture through which the light enters the camera The amount of light is proportional to the area of the aperture http://www.flickr.com/photos/cycleologist/1454436980/ (*) See previous presentation on aperture at http://www.slideshare.net/guioconnor/aperture-in-photography-or-how-boheh-happens

14. The Film The film has an emulsion containing silver salts that react to the presence of light The more light it receives, the more grains of salt will react The coarser the grains of salt the less light you need but the lower the definition of the resulting image(*) http://www.flickr.com/photos/remediatethis/4353934129/

15. (*) That’s the ISO setting for ya

16. The correct exposure needs a certain amount of light.

17. The correct exposure needs a certain amount of light. If you want a faster shot, you need a wider aperture. And vice versa.

18. Alright, alright. What about DSRLs, then?

19. Alright, alright. What about DSRLs, then? Same thing but with a sensor in place of the film.

20. Manual Mode Most DSLRs have a manual mode setting

21. Manual Mode Most DSLRs have a manual mode setting You set the exposure time

22. Manual Mode Most DSLRs have a manual mode setting You set the exposure time You set the aperture

23. Manual Mode Most DSLRs have a manual mode setting You set the exposure time You set the aperture Settings are based on the photometer indication

24. Aperture priority mode Most DSLRs have an Aperture Priority Mode

25. Aperture priority mode Most DSLRs have an Aperture Priority Mode You set the aperture you want to take the picture on

26. Aperture priority mode Most DSLRs have an Aperture Priority Mode You set the aperture you want to take the picture on The camera works out how fast (or slow) it needs to be

27. Aperture priority mode Most DSLRs have an Aperture Priority Mode You set the aperture you want to take the picture on The camera works out how fast (or slow) it needs to be Ideal to control the depth of field

28. f/4.8 f/32

29. Shutter Priority Mode Most DSLRs have a Shutter Priority Mode

30. Shutter Priority Mode Most DSLRs have a Shutter Priority Mode You set the exposure time of the shot

31. Shutter Priority Mode Most DSLRs have a Shutter Priority Mode You set the exposure time of the shot The camera works out the aperture

32. Shutter Priority Mode Most DSLRs have a Shutter Priority Mode You set the exposure time of the shot The camera works out the aperture Ideal to control motion blur

33. 1/500 s 1/90 s

34. But also for extreme light conditions

35. Exposure time 104s, barely visible with the naked eye. Shot with ISO 50. See more at http://www.facebook.com/media/set/?set=a.224883254190744.71882.119779558034448

36. The ISO setting Just as in film

37. The ISO setting Just as in film The higher the ISO the less light you need

38. The ISO setting Just as in film The higher the ISO the less light you need The higher the ISO the more noise you have

39. The ISO setting Just as in film The higher the ISO the less light you need The higher the ISO the more noise you have Different sensors have different qualities for a given ISO value

40. The ISO setting Just as in film The higher the ISO the less light you need The higher the ISO the more noise you have Different sensors have different qualities for a given ISO value ISO is based on the amount of light needed, not the amount of grain/noise produced

41. ISO 1600 ISO 200

42. All fancy exposure settings on your DSLR are based on these three basic principles.

43. ? Questions Further reading http://www.z-oc.com/blog/2007/08/understanding-cameras-and-photography/ http://www.slideshare.net/guioconnor/aperture-in-photography-or-how-boheh-happens