Canon PowerShot G1, Service Manual

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G12
[System Accessories]
-Wide converter lens, tele-converter lens, close-up lens
To meet diverse user needs, a full line-up of optical accessories is
available for the PowerShot G1. The Wide Converter WE-DC58
converts the focal length by about 0.8x and the total focal length of
28mm at the wide-angle end in 35mm film format. Tele-converter
TC-DC58 converts the focal length by 1.5x and the total focal length
of 153mm at the telephoto end in 35mm film format. And Close-up
lens 250D enables shooting as close as 12 cm (from the front of the
lens) at the telephoto end in macro mode. The resulting shooting
area is 50X38mm. However, there are a few restrictions when using
these accessories and a flash together, as shown in Table 2-7. And
there is possiblity of vignette when you use the optical
finder despite attaching these conversion lenses to the cameras. Also,
there is a possiblity of vignette when you take a picture other than
wide angle end with Wide Conversion Lens and tele-photo end with
Tele-conversion lens.
Note: The Conversion Lens Adapter LA-DC58 (sold separately) is required
to attach the WC-DC58, TC-DC58, or 250D 58mm to the camera.
-Compatible with EX-series Speedlites mode for EOS cameras
With its high pixel count and many features, the PowerShot G1 will likely to be used by advanced amateurs and pro users
for creative shooting. Although it has a built-in flash, its maximum range is only 3.6 meters (ISO 100 equivalent) for
telephoto shooting. This is inadequate for these users.
A hot shoe for external Speedlites (220EX, 380EX, 420EX, 550EX) has therefore been provided on the camera. An
external Speedlite enables autoflash control.
Note: The flash will fire at full strength in Manual mode. The flash without above models will fire at full strength.
<Available Flash Features>
-Auto flash (550EX must be set to E-TTL mode.) -FE lock (except for Manual mode)
-Fill flash -Slow sync speed
-Flash exposure compensation (When using the 550EX, the LCD panel’s flash range scale value will not appear correctly.
Besides, you must execute flash exposure compensation with the camera when using the 550EX.)
-Autozoom (except for 220EX)
<Maximum sync speed>
-Speedlites (220EX, 380EX, 420EX, 550EX) : 1/250 sec.
-others : 1/125 sec.
Table 2-7 Relation between each accessories and flash
*
There is a possibility of full-flash.
WC-DC58 (Wide angle end)
TC-DC58 (Telephoto end)
250D 58mm (Telephoto end)
Built-in
Vignette
Vignette
Vignette
External
Auto flash*
Auto flash*
Auto flash*
-Higher capacity Li-Ion battery
The PowerShot G1 utilizes a rechargeable lithium-ion battery (BP-511). This lithium battery has about the same capacity,
yet half the weight per volume as the nickel-hydride battery used by the PowerShot A-series and S-series cameras. And it
has no memory effect.
As the BP-511 is already being used in other
products such as the EOS D30 and the
PowerShot PRO90 IS, as well as two of Canon’s
camcorders (the FV-2 and FV-10) so can be in-
terchanged among all of these products.
Table 2-6 Battery comparison
Model
Item
Voltage/Capacity
Volume
Weight
PowerShot G1
Li-Ion
7.4V/1100mAh
Approx.43.9cm
3
Approx.70g
IXY DIGITAL
Li-Ion
3.7V/680mAh
Approx. 17.1cm
3
Approx. 29g
PowerShot A/S
Ni-MH
6.0V/650mAh
Approx. 70g