Question

2. A telephoto lens with focal length of 80 mm and an aperture setting off/4 is used with a DSLR camera which has an 24x16 mm APS-C sensor. (a) What

is the aperture diameter?(b) What is the angular field-of-view? (c) Taking a permissible circle of confusion diameter of 1/1500 of the diagonal sensor dimension, what is the hyper focal distance?(d) If the camera is focused on an object a distance of 21 m from the camera, what is the distance range for the depth of field?

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