start to learn DSLR will see what is SLR and how it work.Single lens reflex, it mean single lens.Why single lens,rather than single lens is there any other method or multiply lens camera available...?Those are the common questions if you are beginner for photography .Well lets turn to photography history for while.
The first camera of the world is called Camera Obscura , and its used by ancient Chinese and Greeks and it is a simple box and use pinhole or lens to project image to white surface and then draw the projected image manually by using white paper . Read more about history of camera here
After many inventions box camera came to the market as a commercial product.Kodak is the most popular brand among this box camera. After that Photography industry grow fast and many company produced camera and most of them tried to develop the system and mechanism of cameras. As a result of this around 1870 first TLR camera came to the market The definitions of TLR is Twin Lens Reflex. As meaning of twin this camera used two lens.(Read more about TLR) Mostly this camera used by professional and indoor studios.And this camera also known as Mid format camera.This camera used 120 mm size film to capture the image.Evan this tlr camera giving good result it is little bit big and heavy. So mostly this camera used for indoor studio.
This type of camera use two lenses . One lens use to project the image to ground glass so we can see the target image through the view finder and can focus .The second lens directly project the image to film roll.Both lenses moving same time by using some mechanism
This is the basic of tlr camera.This camera use two lenses therefore it take more spaces and size of the camera is big .Later on camera developer use another mechanism and they made SLR - single lens reflex camera.(read more here). This camera use single lens to capture image and view the image same time.Its use mirror and prism to reflect the image to view finder
SLR camera is the most popular camera and later digital slr camera came to the market.This is bit of history of camera and next will learn step by step about Digital Photography.
Some of related site.
1. http://camerapedia.wikia.com/wiki/Camerapedia
2. http://www.tlr-cameras.com/
3. http://en.wikipedia.org/wiki/Camera
4. http://www.digitalcamerareview.com/
5. http://www.dpreview.com/
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