Geek
Speak
By Carthy Chan, I.T. Guru
Now that warmer temperatures are here,
our thoughts turn to vacations and how we are going to capture all those
precious images…of the office, of course. We wouldn’t want to be GWC home-sick
while we’re gone. What better way than to use digital photography.
This edition of Geek Speak will talk
about digital images. Understanding the basics of how digital photos are made
can give a photographer some imaginative ideas on how pictures can be
manipulated for special effect or to enhance an image to reflect reality. Of
course not all aspects of everyday digital photography can be covered in this
article, like file formats, memory cards and all the available features that a
camera may have.
This article will look at the definition
of digital photography, what makes good photos on either film or digital medium,
what Mega Pixels mean for the everyday user, how to easily download images, a
few camera tricks for some common problems and a few suggestions on editing to
help bring out the story in your photos.
All photos in this article were taken on
my Sony 4.0 MP Cyber-Shot DSC P73, a basic point-and-shoot digital camera.
What is digital photography?
Digital photography is the process of
creating an image that can be manipulated by a computer at its pixel level. The
light from objects is captured from digital cameras or scanners onto memory
cards or some other electronic storage device.
Basics from film to digital
When using your camera equipment, many
features from the world of film carry over into digital photography because we
are still using light from the real world to make the images.
The flash, zoom lens and focus features
have the same effect on your pictures regardless of the medium. The flash is
required for a lot of indoor subjects, but they still have to be within 10 to15
feet of the camera to be effective. Zoom lens strength is still required to get
the most amount of original detail in your pictures. Enlarging and under
exposing pictures later can result in loss of detail for both negatives and
digital files. Focus and auto-focus features also work the same way on both
film and digital cameras where better quality glass lenses give better clarity
over plastic lenses.
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