Canon EOS Digital Rebel XTi EF-S 18-55 Kit Manual del producto - Página 20
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Digital Performance
≥
IMAGE PROCESSOR
Renowned for their superior picture quality,
responsive handling, extended battery life and
fast processing speed, DIGIC Image processors
have set the standard for functionality and
performance since their ground-breaking
introduction in 1999. The latest advance in
this distinguished series, the DIGIC 4 Image
Processor, greatly enhances picture quality
and accelerates
processing speeds
for noise reduction
which gives you
better image quality
at higher ISO speeds.
iSAPS TECHNOLOGY
PowerShot cameras automatically find the optimal
settings for Autofocus, Auto Exposure and Auto
White Balance systems. How? iSAPS (Intelligent
Scene Analysis based on Photographic Space)
technology. iSAPS combines advanced prediction
algorithms with statistical frequencies for key
factors based on Canon's over 70 years of
accumulated data. Effortlessly and in any situation,
you'll get the sharp focus and proper exposure
that turn good images into great ones.
High
Frequency
High
Frequency
Bright
Low
Low
Frequency
Luminance
Near
Distance
Dark
Far
Diagram of Photographic Space
38
INTELLIGENT ORIENTATION
SENSOR
PowerShot cameras automatically sense
whether a picture is being taken horizontally
or vertically. The camera's Autofocus, Auto
Exposure and Auto White Balance systems use
the information to achieve a level of image
quality not possible with less sophisticated
cameras. Moreover, pictures are properly
oriented during playback, whether on the
camera's screen or a computer monitor.
Horizontal
Vertical
NOISE REDUCTION
Experienced photographers know that high ISO
speeds can coincide with increased levels of
noise: aberrant or stray signals that degrade
image quality. With Canon's exclusive DIGIC 4
Image Processor, there is no need for compromise.
DIGIC 4 offers a major boost in noise reduction
signal processing to compensate for the higher
ISO settings it enables.
Without Noise Reduction
With Noise Reduction
RAW MODE*
The RAW mode lets you shoot images without
the camera processing them in any way. RAW
images can be processed in your computer,
using Canon's DPP (Digital Photo Professional)
software. Creative control is completely in your
hands as you adjust a wide range of variables to
produce exactly the final image you want.
Optical Technology
OPTICAL IMAGE STABILIZER*
Camera shake often blurs
images in low light and at
long focal lengths.
Canon's Optical Image
Stabilizer technology cor-
rects camera shake so
you can achieve excellent
quality images in many
difficult situations
— outdoors at dusk,
inside without a flash,
Image Stabilizer Unit
even at the end of the zoom
range without a tripod. The sophisticated
system detects camera shake and optically
counters the movement, effectively canceling
unwanted lens movement and vibration.
Because it is an optical system, there is none
of the image degradation typical with electronic
image stabilizers.
With Optical Image Stabilizer
Without Optical Image Stabilizer
UA LENS TECHNOLOGY*
The UA lens is a Canon exclusive: a glass-molded
aspherical lens with an ultra-high refractive
index that delivers incredibly bright, clear shots.
Its amazingly small size is a major factor in
keeping the
PowerShot
cameras so
compact.
* Not on all models.
PowerShot Technology
AF & Exposure Metering
FACE DETECTION AF/AE/FE/WB
You always get the shot you want with a camera
equipped with the DIGIC III or DIGIC 4 Image
Processors featuring Face Detection Technology.
When the shutter button is pressed halfway,
the camera finds the face or faces in the frame
to ensure excellent focus and proper illumination
of both the face(s) and the overall scene.
The system also adjusts the flash for the location
of the face(s).
Without Face Detection AF/AE/FE
With Face Detection AF/AE/FE
finds faces, tracks them as you
Face Detection AF
frame your shot, then delivers perfect focus.
makes all your group shots
Face Detection AE
better by concentrating exposure on your subjects'
faces, not their clothes or the background.
Face Detection FE adjusts the flash exposure
based on the location of the faces in the frame.
detects the faces in the shot
Face Detection WB
and concentrates auto white balance on them,
for the best possible skin tones.
With Face Detection WB
Without Face Detection WB
Face Selector AF lets you focus on a
specific face. The selected face is
double-framed and tracked as it
moves in the frame. There is a
dedicated Face Selector Button
*
Face Selector
for selected models.
Button
†
39