Understanding Exposure: Aperture


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Understanding Exposure: Aperture

  1. 1. Understanding Exposure by Danny Perez Photography Part 2: Aperture
  2. 2. RecapThe exposure is the amount of light receivedby the film or sensor and is determined by howwide you open the lens diaphragm (aperture)and by how long you keep the film or sensorexposed (shutter speed). The effect anexposure has depends on the sensitivity of thefilm or sensor.
  3. 3. The Exposure TriangleIt is better to be under exposed than over exposed!
  4. 4. Correct Exposure✦ Right amount of light✦ Balance of light and dark✦ Light meter indicates correct exposure✦ Combination shutter speed, aperture and ISO✦ Can be 6 or more combinations✦ Auto mode yields a “correct exposure”
  5. 5. Consider This...1. ISO 100 f/4 1/500 sec.2. ISO 100 f/5.6 1/250 sec.3. ISO 100 f/8 1/125 sec. All “correct exposures” Which is best? It depends...
  6. 6. Creative Exposure✦ Isolate a subject✦ Blur your backgrounds✦ Tell a story✦ Show action✦ Freeze action by macrophile It’s about finding the right combination of aperture, shutter speed and ISO
  7. 7. Focus on ApertureUsing aperture to get creative exposures
  8. 8. What is the Aperture by Erwin Bolwidt (El Rabbit)A hole or an opening through which light passes.
  9. 9. Purpose of Aperture by Beth-Kingery Control the amount of light reaching the film or image sensor.
  10. 10. Less is More by Mehmetaergun via Wikimedia Commons The smaller the f number, the large the openingFull Stops 1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, 45
  11. 11. What does this mean? by Brian Lane Winfield MooreI want to take pictures - how do I use this to my advantage?
  12. 12. Amount of LightIn low light a fast lens will allow the lens to gather more light.
  13. 13. Depth of Field by lattiboyI want to take pictures - how do I use this to my advantage?
  14. 14. Creative Aperture✦ Storytelling Apertures✦ Singular-Theme Aperture✦ “Who Cares” ApertureBased on Bryan Peterson’s Understanding Exposure
  15. 15. Storytelling Aperture✦ Sharp focus throughout✦ A beginning, middle and end✦ Landscapes✦ Works best with wide angles✦ Where to focus by E_TAVARES✦ Small aperture f/16, f/22, f/32
  16. 16. Singular-Theme Aperture✦ Isolation of subject✦ Portraits✦ Flowers✦ Telephoto lenses work best✦ Large apertures f/5.6, f/4, f2.8 by Anderson Mancini
  17. 17. “Who Cares” Aperture✦ “f/8 and be there”✦ Use when depth of field is not a concern✦ Subjects at same focal distance✦ Sweet spot on elliptical glass✦ Critical sharpness and great contrast✦ f/8 and f/11 by Ian Muttoo
  18. 18. Bokeh by Josh Liba Aesthetic quality of the blur, in out-of-focus areas,or "the way the lens renders out-of-focus points of light."
  19. 19. But How?Turn the dial: aperture priority or manual mode
  20. 20. Demo Time by msjacobyLet’s try something fun
  21. 21. Question? by e-magicHow? What? Where? When? Why?
  22. 22. Stay TunedShutter speed coming up next