Cleaning and Maintenance of canon eos 500d/rebel t1i/kissx3
Saturday, November 7, 2009
Cleaning and Maintenance
At a fundamental level, all cameras are the same: a lens focuses light onto a recording
medium. Because the recording medium is light-sensitive, it must be kept
in a lightproof box. A shutter in front of the recording medium allows for control
of when the sensor is exposed and how long the exposure will last. Cameras have
worked this way since the beginning of photography in the 1850s, and while all
sorts of new technologies have come along—
everything from light meters to stabilized
lenses to self-timers, color film, and autofocus—the basic principles of a
lens that focuses light onto a light-sensitive medium held in a lightproof box have
remained the same.
Of course, the significant change in a digital camera is the recording medium
that’s being exposed. Rather than a piece of celluloid covered with light-sensitive
chemicals, a digital camera employs a silicon chip covered with light-sensitive bits
of metal. And, where a film camera needs a bunch of mechanics to move the film
in and out of the roll, a digital camera needs an onboard computer and storage
device to process and store the images that it captures.
Other than this change, though, your Rebel T1i is similar in design to a traditional
35mm SLR. The camera body is the lightproof box that houses the image sensor,
shutter, and viewfinder. Of course, it also has lots of other things, like the shutter
button, controls, LCD screen, battery, media card, tripod mount, pop-up flash,
and more.
The Rebel T1i is not weatherproof, meaning that Canon has not engineered it
for handling harsh environments. The various openings on the camera—the
lens mount and assorted doors—are not sealed against sand and moisture. So, if
you’re planning an extended stay in the Sahara or a float trip down the Amazon,
you might want to think about taking a sturdier camera. That said, there’s no
reason you can’t go shooting with the camera in drizzle or light rain. A little water
on the body won’t hurt anything; just wipe off the camera and keep shooting.
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