September 2008
Beginner to intermediate
288 pages
9h 36m
English
Content preview from The Canon EOS Digital Rebel XSi/450D Companion
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CHAPTER 12
LENSES
254
Lenses
One of the great joys of working with an SLR is having the option to change lens-
es. If you’re stepping up to the XSi from a point-and-shoot camera, then there’s
a whole world of new shooting possibilities for you to explore (and a whole new
way to drain your wallet).
By changing the lens on your camera, you can:
Shoot with different focal lengths, from super-wide to extremely telephoto.•
Get higher-quality images. A better lens can improve contrast, color, sharp-•
ness, and other less definable characteristics of an image.
Shoot in lower light. A faster lens—that is, one that can open to a wider aper-•
ture—will give you the option to shoot in much lower light. An f1.2 lens, for
example, can make it possible to shoot at handheld shutter speeds in outright
dark situations.
With an extremely fast lens—such as the Canon 50mm f1.2—you can shoot in
extremely low light at faster shutter speeds, making it possible to capture images
that would be impossible with a slower lens.
Shoot with different effects. Fish-eye lenses, the Lensbaby, and other special-•
ized lenses let you create effects that would be unattainable with other lenses
and very difficult to produce with editing software.
CUSTOMIZING THE XSI
LENSES
255
Choosing a Lens
Your first decision when choosing a lens is ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.