To increase the depth of field.

To decrease the depth of field.

To increase the amount of light entering the lens.

To decrease the amount of light entering the lens.

Aperture and depth of field are directly proportional.

Aperture and depth of field are inversely proportional.

Aperture and depth of field are not related.

The relationship between aperture and depth of field depends on the focal length of the lens.

Aperture

Focal length

Distance to the subject

All of the above

The closest distance at which a lens can focus.

The farthest distance at which a lens can focus.

The distance at which all objects in the scene are in focus.

The distance at which the depth of field is at its maximum.

$$H = rac{f^2}{Nc}$$

$$H = rac{fN}{c}$$

$$H = rac{Nc}{f}$$

$$H = rac{c}{fN}$$

The smallest point of light that can be resolved by the human eye.

The smallest point of light that can be resolved by a lens.

The smallest point of light that can be recorded by a camera sensor.

The smallest point of light that can be projected onto a screen.

A larger circle of confusion results in a shallower depth of field.

A larger circle of confusion results in a deeper depth of field.

The circle of confusion does not affect depth of field.

The relationship between the circle of confusion and depth of field depends on the focal length of the lens.

Focus and sharpness are directly proportional.

Focus and sharpness are inversely proportional.

Focus and sharpness are not related.

The relationship between focus and sharpness depends on the aperture used.

Manual focus

Autofocus

Focus peaking

All of the above

Focusing the lens by hand.

Focusing the lens using a motor.

Focusing the lens using a computer.

Focusing the lens using a sensor.

Focusing the lens by hand.

Focusing the lens using a motor.

Focusing the lens using a computer.

Focusing the lens using a sensor.

A technique for highlighting the areas of an image that are in focus.

A technique for highlighting the areas of an image that are out of focus.

A technique for adjusting the focus of a lens.

A technique for measuring the distance to a subject.

It allows for a shallower depth of field, isolating the subject from the background.

It allows for a deeper depth of field, keeping both the subject and the background in focus.

It allows for a faster shutter speed, freezing motion.

It allows for a slower shutter speed, creating motion blur.

It allows for a shallower depth of field, isolating the subject from the background.

It allows for a deeper depth of field, keeping both the subject and the background in focus.

It allows for a faster shutter speed, freezing motion.

It allows for a slower shutter speed, creating motion blur.

It allows for a shallower depth of field, isolating the stars from the background.

It allows for a deeper depth of field, keeping both the stars and the background in focus.

It allows for a faster shutter speed, freezing the movement of the stars.

It allows for a slower shutter speed, capturing more star trails.