May 2008
Beginner
297 pages
9h 14m
English
Content preview from Canon® EOS Digital Photography Photo Workshop
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.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.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.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.
Chapter 3. LENS BASICS
BUILDING THE BACKBONE OF YOUR SYSTEM
LEARNING THE BASICS OF LENSES
EXPLORING FOCUSING OPTIONS
CONSIDERING THE DEPTH OF FIELD FACTOR
TIPS FOR SHOPPING FOR LENSES
©Michael A. Johnson
You have already seen several references in this book regarding the importance of good-quality optics with high-resolution Canon dSLR cameras. It stands to reason that the more sensitive your capture device is, the more important it is to have top-quality lenses to deliver information to that device. I have seen more than one student purchase one of the higher-end Canon cameras and then a lesser-quality lens because of a shortage of funds. A Digital Rebel XTi with a top-notch Canon L-series lens, as shown in 3-1, produces a notably better image than a Mark III with a cheap aftermarket lens. There's a reason lenses are the backbone of your camera system.
Figure 3-1. The EF 100 f/2.8 Macro lens can also be used in a normal or telephoto range. Taken with a Digital Rebel XTi, 1/250 second at f/8. ©Serge Timacheff
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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.