Canon F1-N manual Specification

31 SPECIFICATION

Eyepiece Shutter:	Built-in. Keeps out extraneous light during
	self-timer and remote control operation.
Dioptric Adjustment:	Built-in eyepiece adjusted to standard
	-1 diopter.
Focusing Screen:	Standard split-image/microprism rangefinder.
	Twelve other types of interchangeable
	screens are optionally available.
Light Metering System:	Through-the-lens (TTL) metering by
	silicon photocell (SPC). Metering area
	is determined by special optical element
	incorporated in each focusing screen.
	Center-weighted average, selectivearea and
	spot metering are optionally available by
	changing the focusing screen.
Meter Coupling Range:	EV -1 (4 sec. at f/1.4) to EV 20
	(1/2000 sec. at f/22) with ISO 100 film and
	FD 50mm f/1.4 lens.
Exposure Preview:	By pressing shutter button halfway.
Meter Mode:	At ”NORMAL,” meter activated as long as shutter
	button is pressed halfway. At ”HOLD,” meter,
	once activated, stays on for 16 sec. At ”LIGHT,”
	meter, once activated, stays on for 16 sees.
	and viewfinder information is illuminated.
	Cancellation possible.
Exposure Compensation Dial:	+- 2 f/stop range in 1/3 f/stop
	increments: 1/4.. 1/2 .. 1 .. 2 .. 4
Shutter:	Horizontal-travel, titanium focal-plane
	shutter with four spindles. Eiectromechanical
	hybrid control. Mechanically controlled at
	speeds from 1/2000 to 1/125 sec., ”d ”
	(1 /90 sec.) and B. Electronically
	controlled at speeds from 1/60 to 8 sees.

77