Canon EOS 10D instruction manual Autofocus

	Specifications
Magnification:	0.88x (–1 diopter with 50mm lens at infinity)
Eye point:	20 mm
Dioptric adjustment range:	–3.0 - +1.0 diopter.
Focusing screen:	Fixed, New Laser Matte screen
Mirror:	Quick-return half mirror
	(Transmission:reflection ratio of 40:60, no mirror cut-off with
	EF 600mm f/4 or shorter lens)
Viewfinder information:	AF (AF points, focus confirmation light), exposure (shutter
	speed, aperture value, manual exposure, AE lock, exposure
	compensation amount, AEB level, partial metering area), flash
	(flash ready, red-eye reduction lamp on, high-speed sync, FE
	lock, flash exposure compensation amount), warnings (exposure
	warning, improper FE lock warning, CF card full warning, CF
	card error warning, no CF card warning, busy), maximum burst
	for continuous shooting, shots remaining
Depth-of-field preview:	Enabled with depth-of-field preview button
• Autofocus
Type:	TTL-CT-SIR with a CMOS sensor
	(TTL secondary image-registration, phase detection)
AF points:	7
AF working range:	EV 0.5-18 (at 20˚C, ISO 100)
Focusing modes:	One-Shot AF, AI Servo AF, AI Focus AF, Manual focusing (MF)
AF point selection:	Automatic selection, manual selection, home position
Active AF point indicator:	Superimposed in viewfinder and indicated on LCD panel
AF-assist beam:	Stroboscopic flash
	Effective range: Approx. 4.0m/13.1ft. at center, approx. 3.5m/
	11.5ft. off-center
• Exposure Control
Metering system:	TTL full aperture metering with 35-zone SPC
	• Evaluative metering (linkable to any AF point)
	• Partial metering (approx. 9% of viewfinder at center)
	• Centerweighted average metering
Metering range:	EV 1-20 (at 20˚C with 50mm f/1.4 lens, ISO 100)
Exposure control systems:	Program AE (Full Auto, Portrait, Landscape, Close-up, Sports,
	Night Portrait, Flash Off, Program), shutter-priority AE,
	aperture-priority AE, depth-of-field AE, manual exposure, E-
	TTL autoflash
ISO speed:	Basic Zone modes: Automatic
	Creative Zone modes: Equivalent to ISO 100, 200, 400, 800,
	1600, and ISO 3200 with ISO speed extension.
Exposure compensation:	AEB: +/–2 stops in 1/2- or 1/3-stop increments
	Manual: +/–2 stops in 1/2- or 1/3-stop increments (can be
	combined with AEB)
AE lock:	Auto: Applied when focus is achieved in the One Shot AF
	mode with evaluative metering.
• Shutter	Manual: Applied with AE lock button.
Type:	Electronically-controlled focal-plane shutter

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Reference

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