III. PERFORMANCE
21
The power circuit board has the circuit
that generates and supplies the volt-
age required by the camera's circuits.
The RoHS directive restricts the use
of 6 toxic substances: lead, mercury,
cadmium, hexavalent chromium,
polybrominated biphenyl, and poly-
brominated diphenyl ether. It
applies to products sold in the EU
(effective from July 1, 2006). All of
the EOS 40D's parts conform to this
directive.
Fig. 62 Cross section at center
Eyepiece lens 3
Eyepiece lens 1
Eyepiece lens 2
Image sensor
Secondary mirror
LCD monitor
AF sensor
Secondary
image-forming lens
Infrared-absorption filter
Focusing
screen
Pentaprism
Metering lens
SI lens
Metering sensor
Main mirror
Shutter
Built-in flash
AF mirror
Main board
LCD in the viewfinder
SI reflective
plate
Cross Section at Center
