Nikon D40 manual Technical Notes/Specifications

Exposure

Metering	Three-mode through-the-lens (TTL) exposure metering system
Matrix	3D color matrix metering II (type G and D lenses); color matrix metering II (other CPU
	lenses); metering performed by 420-pixel RGB sensor
Center-weighted	Weight of 75% given to 8-mm circle in center of frame
Spot	Meters 3.5-mm circle (about 2.5% of frame) centered on active focus area
Range (ISO 100 equivalent,	0–20EV (3D color matrix or center-weighted metering)
f/1.4 lens, 20°C/68°F)	2–20EV (spot metering)
Exposure meter coupling	CPU coupling
Digital Vari-Program/	Digital Vari-Program (					auto,	auto/no flash,	portrait,	landscape,	child,
exposure modes	sports,			close-up,		night portrait); programmed auto (P) with flexible program;
	shutter-priority auto (S); aperture-priority auto (A); manual (M)
Exposure compensation	–5–+5EV in increments of 1/3 EV
Exposure lock	Exposure locked at detected value with AE-L/AF-L button
Shutter	Combined mechanical and CCD electronic shutter
Speed	30–¼,000s in steps of 1/3 EV, bulb
White balance	Auto (TTL white balance with 420-pixel RGB sensor); six manual modes with fine tun-
	ing and preset white balance
Built-in flash	•	,	,	, ,	: Auto flash with auto pop-up
	• P, S, A, M: Manual pop-up with button release
Guide number (m/ft)	• Approximately 17/55 at ISO 200 and 20°C/68°F (manual 18/59)
	• Approximately 12/39 at ISO 100 and 20°C/68°F (manual 13/42)
Flash
Sync contact	X-contact only; flash synchronization at shutter speeds of up to 1/500 s
Flash control
TTL	TTL flash control by 420-pixel RGB sensor. i-TTL balanced fill-flash for digital SLR and
	standard i-TTL fill-flash for digital SLR available when CPU lens is used with built-in
	flash, SB-400, SB-800, and SB-600
Auto aperture	Available with SB-800 and CPU lens
Non-TTL auto	Available with such Speedlights as SB-800, 80DX, 28DX, 28, 27, and 22s
Range-priority manual	Available with SB-800
Flash mode	•	,	,	,	: Auto, auto with red-eye reduction; fill-flash and red-eye reduction
		available with optional Speedlight
	• : Auto slow sync with red-eye reduction, auto slow sync; slow sync with red-eye
		reduction and slow sync available with optional Speedlight
	•	,	: Fill-flash and red-eye reduction available with optional Speedlight
	• P, A: Fill flash, red-eye reduction, slow sync with red-eye reduction, slow sync, rear-cur-
		tain with slow sync
	• S, M: Fill flash, red-eye reduction, rear-curtain sync
Flash compensation	–3–+1EV in increments of 1/3 EV
Flash-ready indicator	Lights when built-in flash or SB-series Speedlight such as 400, 800, or 600 is fully
	charged; blinks for about 3s after flash is fired at full output
Accessory shoe	Standard ISO hot-shoe contact with sync, signal, and ground contacts and safety lock
Nikon Creative Lighting	Supported with built-in flash, SB-400, SB-800, and SB-600; Advanced Wireless Lighting
System	supported with SB-800 or SU-800 as Commander.
Monitor	2.5in., 230,000-dot, low-temperature polysilicon TFT LCD with brightness adjustment
Video output	Can be selected from NTSC and PAL
External interface	Hi-Speed USB
Tripod socket	¼in. (ISO 1222)
Firmware upgrades	Firmware can be upgraded by user

120 Technical Notes/Specifications