Canon EOS 40D - Manual (Page 182)

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Specifications
Recording functions: With the WFT-E3/E3A attached, image recording to the CF card and to USB
external media connected to the WFT-E3/E3A will be possible as follows:
(1) Standard
(2) Automatic switching of recording media
(3) Separate recordings according to image-recording quality
(4) Recording images having the same size
Backup recording: Enabled with WFT-E3/E3A attached
• White Balance
Type: Auto, daylight, shade, cloudy, tungsten light, white
fluorescent light, flash, custom, color temperature setting
Auto white balance: Auto white balance with the image sensor
Color temperature
compensation:
White balance correction: ±9 stops in full-stop increments
White balance bracketing: ±3 stops in full-stop increments
* Blue/amber direction or magenta/green direction possible
Color temperature
information transmission: Provided
• Viewfinder
Type: Eye-level pentaprism
Coverage: Vertical/Horizontal approx. 95%
Magnification: Approx. 0.95x (-1 diopter with 50mm lens at infinity)
Eyepoint: Approx. 22 mm
Built-in dioptric adjustment: -3.0 - +1.0 diopter
Focusing screen:
Interchangeable (2 types sold separately), Ef-A standard
focusing screen provided
Mirror: Quick-return half mirror (Transmission:reflection ratio of 40:60,
no mirror cut-off with EF600mm f/4L IS USM or shorter lenses)
Viewfinder information: AF information (AF points, focus confirmation light), exposure
information (shutter speed, aperture, AE lock, exposure level, ISO
speed, exposure warning), flash information (flash ready, high-speed
sync, FE lock, flash exposure compensation), monochrome shooting,
white balance correction, maximum burst, CF card information
Depth-of-field preview: Enabled with depth-of-field preview button
• Autofocus
Type: TTL secondary image-registration, phase detection
AF points: 9 (Cross-type)
Metering range: EV -0.5 - 18 (at 23°C/73°F, ISO 100)
Focus modes: One-Shot AF, AI Servo AF, AI Focus AF, Manual focusing (MF)