What is focusing ? Explain the term in terms of refraction of light .
1 Answer
Focusing is the process of adjusting the distance between lenses and the screen to produce a clear image.
Focusing, also called ocular accommodation, ability of the lens to alter its shape to allow objects to be seen clearly. ... This double bending causes the rays to converge at a focal point behind the lens so that a sharper image can be seen or photographed.A computer inside the camera evaluates the signal from the autofocus sensor and commands the lens to adjust the focusing elements inside the lens until the two images appear identical. Once the two images match, the image is in focus. Early sensors just evaluated vertical details in the image.
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- Pick a spot on your wall where you will hang the focus chart. ...
- Once the focus chart is up, set up the camera on your tripod and make sure that the camera is placed parallel to the focus chart. ...
- The distance between the camera and the wall depends on the focal length of the lens you are testing.
Focusing is the moving of the lens elements until the sharpest possible image is achieved. Depending on the distance of the subject from the camera, the focusing elements have to be set a certain distance from the camera's sensor to form a clear image.