Nikon D40 Technical Notes/Optional Accessories, Use Only Nikon Brand Electronic Accessories

Technical Notes

Optional Accessories

One advantage of digital SLR cameras is the wide variety of accessories they support. See our web sites or product catalogs for up-to-date information on accessories for the D40.

Flash units (Speedlights)

ML-L3 remote control

Viewfinder accessories

Lenses Batteries

Software		AC adapters
	Filters	Power connectors

Use Only Nikon Brand Electronic Accessories

Only Nikon brand accessories certified by Nikon specifically for use with your Nikon digital camera are engineered and proven to operate within its operational and safety requirements. THE USE OF NON-

NIKON ACCESSORIES COULD DAMAGE YOUR CAMERA AND MAY VOID YOUR NIKON WARRANTY.

Picture Angle and Focal Length

The size of the area exposed by a 35-mm camera		Picture size (35-mm format)
is 36×24mm. The size of the area exposed by the
		(36 mm × 24 mm)
D40, in contrast, is 23.7×15.6, meaning that the	Lens	Picture diagonal
picture angle of a 35-mm camera is approxi-		Picture size (D40)
mately 1.5 times that of the D40. The approxi-
		(23.7 mm × 15.6 mm)

mate focal length of lenses for the D40 in 35-mm	Picture angle (35-mm format)
format can be calculated by multiplying the focal
	Picture angle (D40)
length of the lens by about 1.5.

96

Technical Notes/Optional Accessories