UnderstandingLenses.pdf

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UNDERSTANDING LENSES
Written by Kent DuFault
https://www.flickr.com/photos/htakashi/8738815960/
Takashi Hososhima
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CONTENTS
Why do certain lenses cost
hundreds of dollars and others
thousands of dollars?
Other Construction
Considerations!
How big is the focus ring?
How does the aperture ring
function?
01
p.6
09
Is having a ‘fast’ lens important?
p.22
Do I want a zoom lens, a prime
lens, or BOTH?
02
p.9
10
p.24
03
p.13
11
Should I buy OEM (Canon, Nikon,
p.25
Sony) or Third Party (Sigma,
Tamron, Tokina)?
What the heck is a focal length
factor?
I’m now going to bore you with
two technical terms
Lenses you may have never
heard of
What about a teleconverter?
p.26
04
p.14
12
05
How quickly, and silently, does the
p.16
lens autofocus motor function?
Additional Features…
That rotating device called
the tripod collar
This is the importance
of a lens hood
p.18
13
p.28
06
14
p.30
07
p.20
15
p.35
08
p.21
16
About the Author
p.36
Sure. I know what you’re thinking:
“I know what a lens is! It’s on the front of
my camera and it focuses the picture.” You
may even know the difference between a
wide-angle, normal, or telephoto lens.
But, have you ever wondered why some
lenses cost a couple of hundred dollars
and others cost thousands?
https://www.flickr.com/photos/darronb/10683438236
Darron Birgenheler
If you witnessed a photographer shooting with this lens, you would probably think, ‘Wow! Expensive
lens!’ Looks can be deceiving. This lens would retail for less than $260.00 USD.
UNDERSTANDING LENSES //
©
PHOTZY.COM
3
Do you know what the terms ‘diffraction’
and ‘resolving power’ are? Are you
intimidated a little bit by technical jargon?
When you go to buy your next lens, would
you like to be armed with some good old-
fashioned knowledge that will help you
make an intelligent decision?
If so, this is the guide for you.
https://www.flickr.com/photos/seeminglee/8609492274
See-ming Lee
UNDERSTANDING LENSES //
©
PHOTZY.COM
4

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