Every camera ever made, from the first wooden box camera to today’s compact and efficient digital cameras, works exactly the same way. At this point you’re probably thinking that I’ve lost my marbles - there’s no way that a 19th-century hunk of wood does the same thing that your sleek, 21st-century technological marvel does.
While there are amazing and obvious differences, the heart of the camera and fundamental principles that enable a camera to take a picture haven’t changed in more than 100 years.
concepts of shutter speed, aperture, and more, recently, white
balance have remained exactly the same since the
At the most basic level, a camera is a lightproof box with a covered hole in it. When it comes time to take a picture, the hole’s cover needs to move away from the opening for a moment to let light strike a digital sensor (or film, if you’re using a film camera). Inside most cameras is a small shutter, which works very much like a set of Venetian blinds you might hang over a window. That shutter hangs over the hole like a drape. When you press the shutter release button to take a photo, the shutter moves aside and lets light hit the digital sensor, and then snaps quickly back into place. Since the sensor in your camera is very sensitive to light, that hole only needs to be uncovered for a fraction of a second in order to let enough light in to make a picture.
Let in too much light, and the photo will be washed out and there will be no detail - lines on people’s faces, letters and numbers on signs, and other fine objects will become blurs. Let in too little light, and your picture will be too dark to see. Photographers call any picture where the shutter has been open too long overexposed and any picture where the shutter hasn't been open long enough underexposed.
Although the history of digital photography is not very long, digital photography has already transformed how people take and view photos.
Before digital photography, most photos had been viewed as prints. Today, however, the majority of photos are edited and viewed on computers. Digital photography allows a photographer to develop his own film by using digital printing.
The history of digital cameras began as early as the 1980s, when digital photography replaced traditional film in astronomy. Digital cameras capture light better than film plates.
Since their introduction, commercial digital cameras have largely replaced manual cameras, as photographers can more easily upload, edit and email their pictures.
Digital photography printing allows photographers to create high quality prints in their own homes. As the history of digital photography progresses, expect to see even more options and features added to digital cameras.
Today, you can get a decent digital camera for less than $500 with many different features and options.