Journal: Av & DoF

Aperture & Depth of Field

1. Standard Aperture/F-stops-
                  -the ratio of the focal length of the lens to the diameter of the aperture

2. Aperture Priority-
   a camera mode that allows you to select the aperture in over the available range and have the camera calculate the best shutter speed to expose light correctly
3. Ambient Light-
   natural, available light that’s not added by the photographer
4. Artificial Light-
   light that comes from man-made light source
5. ASA/ISO/Film Speed-
   - ASA 'American Standards Association' responsible for supplying the speed rate that measures the degree to which film is sensitive to light
   - ISO 'International Organization for Standardization' film speed ratings are used it indicate the relative amount of light necessary to give proper exposure
   - Film speed is the measure of a photographic film's sensitivity to light
6. Bracket- 
                 -means to take multiple photos of the same scene with different exposure settings. 
7. Depth of Field-
   amount of a photo that will be in focus
8. Exposure Triangle-
   

    - each three aspect of the triangle relate to light and how it enters and interacts w/ the camera
                 -  the three elements, ISO, Aperture, and Shutter Speed, that if one iso was changed it effects                  both shutter speed and aperture for the photo; if either Av or shutter speed were modified it will only effect themselves and not iso
9. How to Control Depth of Field-
   

   -  Large Av will decrease DOF and a small Av will make a large DOF

   Large aperture (remember it’s a smaller number) will decrease depth of field while small aperture (larger numbers) will give you larger depth of field.
   
   Read more: http://digital-photography-school.com/aperture#ixzz2CyY5A9Xb
10. Light Meter-
    -a sensor used to measure light and indicate the ideal exposure settings

Find examples for your journal label each image and guess the aperture settings used on the camera.

Short, f-22

medium f-16

wide f-1

(The photos above belong to their rightful owners, I own nothing)