Canon PowerShot G5 Service Manual - Page 14

Full Features - 16x zoom

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2-2 Full Features - Digital zoom function with continuously changing angle of view (Maximum of approximately 16x when used in combination with the optical zoom) The digital zoom magnification of the PowerShot G5 increases from approx. 3.6x, employed on PowerShot G3 to approx. 4.1x owing to employment of 5M-pixel CCD. The field of view can be adjusted to a maxi- mum of approx. 16x (35 mm film equiva- lent: 35 - 567 mm) by combining the approx. 4.1x digital zoom magnification to the optical 4x zoom lens. In addition, because it is essential that the image zooms in smoothly on the LCD moni- tor when using the digital zoom fea- ture, there are several dozen image capturing positions for the monitor display. In light of practical considerations, there are 6 posi- tions, including both end positions, at which zooming can actually stop. Table 2-3 Focal length and capturing pixels of digital zoom In the PowerShot G5, the functions provided by "DIGIC" allow digital zoom and optical zoom to be performed at equivalent zoom speeds, so that there is no difference that is noticeable in actual use. Fig. 2-1 Conceptual diagram of Digital Zoom 1-10

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1-10
2-2 Full Features
- Digital zoom function with continuously changing angle of view (Maximum of approximately 16x when used
in combination with the optical zoom)
Table 2-3 Focal length and capturing pixels of digital zoom
Fig. 2-1 Conceptual diagram of Digital Zoom
The digital zoom magnification of the
PowerShot G5 increases from approx. 3.6x,
employed on PowerShot G3 to approx. 4.1x
owing to employment of 5M-pixel CCD.
The field of view can be adjusted to a maxi-
mum of approx. 16x (35 mm film equiva-
lent: 35 - 567 mm) by combining the
approx. 4.1x digital zoom magnification to
the optical 4x zoom lens.
In addition, because it is essential that the
image zooms in smoothly on the LCD moni-
tor when using the digital zoom fea-
ture, there are several dozen image capturing
positions for the monitor display. In light of
practical considerations, there are 6 posi-
tions, including both end positions, at which
zooming can actually stop.
In the PowerShot G5, the functions provided by
“DIGIC” allow digital zoom and optical zoom to be performed at equivalent zoom speeds, so that
there is no difference that is noticeable in actual use.