1. Reciprocity Is a photographic theory that states: that they are many different combinations of balanced exposures.

2. Reciprocity is Equal Balance Exposures We refer to these equal balanced exposures as > Equivalents <

3. “Review”

4. Equivalents Example: Balanced Exposure f/5.6 @ 1/125 f/2.8 @ 1/500 f/4 @ 1/250 f/5.6 @ 1/125 f/8 @ 1/60 f/11 @ 1/30

5. All of the above shutter speed and f/stop combinations would be equivalent exposures and would result in balanced exposures for the subject being photographed.

6. Equivalents Quiz: f/2 @ 1/1000 f/___ @ 1/___ f/4 @ 1/250 f/___ @ 1/___ f/8 @ 1/60

7. Equivalents Answers: f/2 @ 1/1000 f/2.8 @ 1/500 f/4 @ 1/250 f/5.6 @ 1/125 f/8 @ 1/60

8. Why Do We Practice Reciprocity ?

14. Equivalents Which Shooting Mode Do You Use? Manual (gives you full control but do you need it?) Shutter Priority (TV) Aperture Priority (AV)

15. Equivalents Manual Mode: allows you to control both “Movement” and “Depth of Field” freely without having to switch shooting modes.

16. Equivalents Aperture Priority Mode: allows you to control “Depth of Field” by choosing the f/stop you wish to shoot at and the camera will choose the correct shutter speed to give you a balanced exposure.

17. Equivalents Shutter Priority Mode: allows you to control “Movement” by choosing the shutter speed you wish to shoot at and the camera will choose the correct f/stop to give you a balanced exposure.

18. Equivalents Both Shutter Priority & Aperture Priority Shooting Modes make it easier to do equivalents so we can take advantage of the creative controls that our cameras allow us to do!