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Wednesday, March 5, 2014

Assessment 1, Activity 4 - Exposure

This exercise aimed to show the effect of altering exposure on an image in different lighting circumstances. 

Task 1 involved shooting an object with a strong back light, an object with a very dark background and a light toned subject.

TASK 1:

IMAGE 1: A subject with a very light background
(50mm, ISO 100, f4.0, 1/500)

Image 1 was taken with the sun in the background of the object and the sky was very bright. Consequently, the side of the pig without sun was very dark (left image). I lightened the image by a third of a stop (+1/3) as seen on the right so as to lighten the shadows but try not to overexpose the sky.


 IMAGE 2: An subject with a very dark background
(50mm, ISO 100, f4.0, 1/80)
Image 2 was taken with dark bushes in the background, making the subject appear much lighter than it's surroundings (left image). I lightened the image by two thirds of a stop (+2/3) to make the background less oppressive. 

IMAGE 3: A light toned subject
(50mm, ISO 100, f4.0, 1/400)
This image was shot in good light, however I lightened the image by two thirds of a stop (+2/3) to brighten it up.


TASK 2:

Task 2 involved experimentation with bracketing. Below are 7 images taken on a tripod of a pavilion which had both shadows (inside the pavilion) and light (on the ground in front and on the roof).



As can be seen in the above images, I varied the photo by several stops of light. Image 1 is far too dark and shadowed, while image 7 is far to overexposed and bright. The ground is so bright it disappears. I think the perfect exposure is at +0.7  (image 5). There is enough light to brighten the shadows in the gazebo but not so much that is makes the ground and roof look blown out.




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