aperture is like what part of the eye
To be more specific, the iris is the part of the eye that most resembles the aperture of a lens and works in very much the same way. The iris is a circular muscle that controls the amount of light that enters and strikes the retina, the part of the eye that captures the 'image' and processes it. The aperture of a camera lens consists of 8 to 10 metal blades creating a circular aperture that does the same for the sensor, or film frame of the camera. After light enters the pupil, it hits the lens. The lens sits behind the iris and is clear and colorless. The lens' job is to focus light rays on the back of the eyeball — a part called the retina. The lens works much like the lens of a movie projector at the movies. Your retina is in the very back of the eye. Answer The aperture is like the iris of the eye. When the aperture is very small, you will get a sharper focus and more depth of field-- near and far things in th … e scene will tend to be sharper. The size of an aperture in a lens can either be fixed (like most compact cameras) or adjustable (like an SLR camera). Aperture size is usually calibrated in f-numbers or f-stops, i.e. those little numbers engraved on the lens barrel, e.g. f/22, f/16, f/11, f/8.0, f/5.6, f/4.0, f/2.8, f/2.0, f/1.8 etc. The aperture numbers are a ratio of the length of the lens to the diameter of the front element, or the… amount of the front element the iris is allowing to be used. Let's say you had a 50mm f/2.0 lens. The aperture of the lens with the iris wide open is 1/2 the focal length, or 25mm. If you also had a 100mm f/2.0 lens the front element would be 50mm in diameter, and a 1000mm f/2.0 lens would have a 500mm front element. Other parts of the human eye play a supporting role in the main activity of sight: 1  Some carry fluids (such as tears and blood) to lubricate or nourish the eye. 2  Others are muscles that allow the eye to move. 3  Some parts protect the eye from injury (such as the lids and the epithelium of the cornea). The word aperture refers to the diaphragm opening inside a photographic lens. it works in a similar way to the iris in the human eye. Just like the iris regulates the amount o … f light that passes into the eye by closing and opening, the size of the diaphragm opening in a camera lens regulates the amount of light that passes through the lens onto the film inside the camera at the moment when the shutter curtain in camera opens during an exposure process. In a camera this is done by altering the f/number. In the eye it occurs via an automatic physiological response. Because its diameter can be changed to alter the light level on the sensor behind it. In a camera this is done by altering the f/number. 15,778 Contributions. 1  I am an Army veteran who has worked in the graphic arts, photography, transportation and retail industries. 2  Military Police veteran with a love of languages, travel and useless trivia. 3  I am an Army veteran who has worked in the graphic arts, photography, transportation and retail industries. Like clear glass, the cornea gives your eye a clear window to view the world through. Behind the cornea are the iris, the pupil, and the anterior chamber. The iris is the colorful part of the eye.
The aperture is like the iris in the human eye.