Why is it that you have to adjust cameras to different lighting but human eyes does it automatically?

Question

can anyone give me more than "because a camera is not an eyeball" please.

Answer 1

Cameras do not have muscles and ligaments!

Answer 2

b.c. a camera is not an eyeball.

Answer 3

Its because you are human, the brain did the adjustment for you. As for a mechanical camera, you need to do this feature yourself If you were to invest in today's camera, you will have the camera's intelligence adjusting it. All you need to do is to press the bottom half-way for the adjustment and all the way down to capture the picture.

Answer 4

One of the ways your camera adjusts to the available light is by enlarging/shrinking the aperture. You make the aperture smaller to take in less light, or bigger to take in more.

Your eye works on the same priciple. The iris of your eye (the coloured bit) is largely a muscle. Receptors in the back of the eye tell the iris to contract or detract depending on the available light. This is why when you shine a light in your eye you will see your pupil shrink immediately. Genius!