March 2014
Beginner
128 pages
2h 1m
English
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Lenses made easy
Lens lingo
ZOOM AND PRIME
Lenses can be split into two types. There are ones which allow you to zoom in and out – you guessed it: zoom lenses. And there are ones that don’t. These are called ‘prime’ or ‘fixed’ lenses as they are fixed at one particular focal length.
FOCAL LENGTH
This is measured in millimetres. Put simply, focal lengths are either ‘short’ or ‘long’. Shorter focal lengths give a wide-angle effect which makes objects seem further away. Longer focal lengths give a telephoto effect which makes objects seem closer.
FIELD OF VIEW
This refers to how much of the world you can see through the lens. Wide-angle lenses (shorter focal lengths) offer a wider field of view. Telephoto lenses (longer focal lengths) offer a narrower ...
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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.Julian F.
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.