Nikon D40 Owner's Manual page 129

Flash Control ( 99–101)
The following types of flash control are supported when a CPU lens is used in combination
with the built-in flash or optional SB-400, SB-800, or SB-600 Speedlights.
• i-TTL Balanced Fill-Flash for Digital SLR: Flash output is adjusted for a natural balance between
the main subject and the background.
• Standard i-TTL Fill-Flash for Digital SLR: Flash output is adjusted for the main subject; the
brightness of the background is not taken into account. Recommended for use with
exposure compensation, for shots in which the main subject is emphasized at the
expense of background details, or when using an SC-series 17, 28, or 29 sync cable.
Standard i-TTL flash control is used with spot metering or when selected with the optional
Speedlight. i-TTL balanced fill-flash for digital SLR is used in all other cases.
Shutter Speeds Available with the Built-in Flash
The following shutter speeds are available when the built-in flash is used.
Mode
, , , P, A
Aperture, Sensitivity, and Flash Range
Flash range varies with sensitivity (ISO equivalency) and aperture.
Aperture at ISO equivalent of
200 400
2 2.8
2.8
4 5.6
5.6
8 11
11 16
16 22
22 32
Supported Standards
• DCF Version 2.0: The Design Rule for Camera File Systems (DCF) is a standard widely used in
the digital camera industry to ensure compatibility among different makes of camera.
• DPOF: Digital Print Order Format (DPOF) is an industry-wide standard that allows pictures
to be printed from print orders stored on the memory card.
• Exif version 2.21: The D40 supports Exif (Exchangeable Image File Format for Digital Still
Cameras) version 2.21, a standard in which information stored with photographs is used
for optimal color reproduction when the images are output on Exif-compliant printers.
• PictBridge: A standard developed through cooperation with the digital camera and printer
industries, allowing photographs to be output directly to a printer without first transfer-
ring them to a computer.
Shutter speed
/ – / s
1 1
500 60
/ – / s
1 1
500 125
800
4
4 5.6
8
8 11
16
22
32
—
Mode
S, M
1600 m
5.6 1.0–7.5
8 0.7–5.4
11 0.6–3.8
16 0.6–2.7
22 0.6–1.9
32 0.6–1.4
— 0.6–0.9
— 0.6–0.7
Technical Notes/Appendix 117
Shutter speed
/ –1s
1
500
/ –30s
1
500
Range
ft.
3ft. 3in.–24ft. 7in.
2ft. 4in.–17ft. 9in.
2ft.–12ft. 6in.
2ft.–8ft. 10in.
2ft.–6ft. 3in.
2ft.–4ft. 7in.
2ft.–2ft. 11in.
2ft.–2ft. 4in.