What type of image does a simple camera lens form on the sensor?

For a distant object, where should the camera sensor be placed relative to the lens?

State the lens equation used for camera focusing.

Why must the sensor move farther from the lens to focus on a closer object?

A camera lens has \(f=50\,\mathrm{mm}\). Approximately where is the sensor for a very distant object?

A \(50\,\mathrm{mm}\) lens focuses on an object \(2.0\,\mathrm{m}\) away. Find the image distance.

Define the f-number of a camera lens.

A \(50\,\mathrm{mm}\) lens is set to f/2.0. Find the aperture diameter.

A lens changes from f/4 to f/2 with the same focal length. How does the aperture diameter change?

A lens changes from f/4 to f/2. How does the light-gathering area change?

What happens to image size on the sensor when focal length is increased for the same distant object?

A \(1.8\,\mathrm{m}\) person is \(10\,\mathrm{m}\) from a \(50\,\mathrm{mm}\) lens. Estimate the image height.

What is the magnification in macro photography at 1:1 reproduction?

For a simple thin lens, what object and image distances give 1:1 reproduction?

What does stopping down a camera lens mean?

Why does a larger aperture usually give a shallower depth of field?

Why is a real image required in a camera?

A camera lens has \(f=35\,\mathrm{mm}\) and aperture diameter \(12.5\,\mathrm{mm}\). Find the f-number.

A camera focuses at infinity with sensor distance \(s'=80\,\mathrm{mm}\). Estimate the focal length.

A \(100\,\mathrm{mm}\) lens photographs a distant object. Compared with a \(50\,\mathrm{mm}\) lens on the same sensor, how does the image size compare?