Tokina AT-X 116 PRO DX, Nikon T5111603 ユーザーズマニュアル
製品コード
T5111603
24
The range across the film surface onto which the subject is exposed
is expressed as an angle, called the angle of view. Wide-angle
lenses with their short focal lengths have a wide angle of view, which
means the exposure range is wide. Conversely, telephoto lenses,
which have long focal lengths, have a narrow angle of view, making
the exposure range narrow. So a wide-angle lens is used to take a
wide area of a subject nearby whereas a telephoto lens is used to
take only part of a subject located further away. A single zoom lens,
meanwhile, can function as a number of lenses with different focal
lengths, enabling you to smoothly alter the angle of view and quickly
frame the shot. You can select your lens to create the effect of distance
or depth of field, or to suit the location and surrounding conditions.
Angle of View
T O K I N A ' S L E N S T E C H N O L OG Y
Some Examples of Effective Focal Length in Relation to Sensor Size
Full Frame Sensor
Canon EOS 1DX, 5D Mark III
1Ds Mark III, 5D, 5D Mark II
Nikon D4, D800 (FX format)
APS-C size sensor
(1.5x= Full Frame Sensor)
Nikon D40, D60, D90, D300
D3000, D5000, D7000
SONY a57, a65, a77
APS-H size sensor
(1.3x= Full Frame Sensor)
EOS 1D Mark II,
1D Mark IIn,1D Mark III
APS-C size sensor
(1.6x= Full Frame Sensor)
Canon EOS 40D, 50D, 60D, 7D
Rebel T4i, T3i, T2i, T3,
650D, 600D, 550D, 1100D
Micro Four Thirds size sensor
(2x= Full Frame Sensor)
Olympus PEN E-P3, E-PL3
E-PM1, OM-D, E-M5
Panasonic Lumix GH2, GX1
TokinaLensCatalog-2012:TokinaLensCatalog07THK 12/09/12 14:23 Page 24