what is defined as the size of the opening in the lens when exposing a photograph to light This is a topic that many people are looking for. bluevelvetrestaurant.com is a channel providing useful information about learning, life, digital marketing and online courses …. it will help you have an overview and solid multi-faceted knowledge . Today, bluevelvetrestaurant.com would like to introduce to you How Does A Camera Work? A Photography Tutorial for Beginners.. Following along are instructions in the video below:
“Story of the camera started with ibn al haytham nthe. Father of ophthalmlogy. He was was a scientist mathematician and a doctor nfrom golden age of muslim civilization. He was keen observer from his experiments.
He explained that light ntravelled in a straight line and he proved it by projecting. An image to a surface through na small hole in a darkroom. He also used his experiments to explain how nthe human eye works ibn al haytham s darkroom. Was later called ncamera obscura.
His work on eyes and images laid the foundation nfor modern day cameras. This includes both video cameras and still ncameras. Let s have a look at your camera to understand nsome..
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Basic concepts on how camera works your camera is a darkroom that has a hole nin front of it the hole allows the light to come into the darkroom. The light enters. The hole in a straight line nand gets projected on the wall of the dark room. When taking photos.
A photographer wants to ncontrol the amount of light coming in to the camera. And he wants a sharp focused image this design lacks both let s introduce a lens in our camera design lens is mounted or placed in front of the ncamera hole as part of the design a lens manufacturer ncan have one or a series of lenses to make it work a lens helps us control the light entering nthe camera. It focuses the light on a specific area within nthe dark room to capture the image of this light falling non the surface of the camera. We insert a medium that is sensitive to light in the old days this used to be film.
But nmost modern camera have digital sensors the light coming in through the lens thus nfalls on the medium and we save it in the digital cameras. The sensitivity of nthe medium can be adjusted via the iso settings. Now that we are able to focus light on the nmedium..
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More accurately we need to have more control on the light for that let s look at how human eye works during day time when there is bright light naround us the iris muscle of our eye constricts to prevent excessive light from entering the neye. At night time or in low light conditions nthe iris dilates to allow more light to come in for more visibility. Let s have a look at how we can control the namount of light coming into the camera in our design. We need something that can ncontract and expand like a human eye.
An aperture is an opening through which light ntravels and in a camera. It needs to be able to contract and expand to allow less or more nlight to enter aperture is installed inside the camera lens. So not only your image is focused by the nlens. But the amount of light is also controlled by the aperture of your camera you can control the aperture in f.
Stops using nthe aperture priority mode in the camera. Let s see how we can stop the light from falling non the medium. All the time you only want the camera to take the photo nwhen you press the button..
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Don t you a shutter is a device the allows the light nto pass for a determined period of time for the purpose of exposing the film or the digital nsensor. A shutter is installed inside the camera. It is like a door that stops the light it only opens. When you press the button on nyour camera to take a photo.
Once the camera has finished taking. The photo. Nthe shutter closes you can control the shutter speed in second nusing. The shutter priority mode in the camera as a photographer you need to view and compose nyour shot before you take it inside the camera is a mirror that is placed nin front of the medium.
When you press the button to take a photo nthe mirror flips up to allow the light to travel towards the medium. But when the mirror is closed it bounces nthe light into a prism and then light goes out through an opening called a viewfinder. This is how you are able to view the scene nin front of you let s summarise and review..
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What we have learnt nin this tutorial your camera has a medium to capture the lightmedium ncan be film or digital sensor. The lens of the camera focuses light on the nmedium aperture of the lens controls the amount of nlight coming in your camera. The shutter opens for a predetermined period nof time to allow the light to fall on the medium and the mirror allows you to see through the nviewfinder. How do i take good photos is a very common nquestion aside for developing an eye for lovely compositions.
Nthe secret recipe for good photography is learning the art of aperture shutter and nthe iso. ” ..
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