Nikon D3100 Reference Manual page 187

AF-S VR Zoom-Nikkor 200–400mm f/4G IF-ED
AF-S NIKKOR 200–400mm f/4G ED VR II
PC-E NIKKOR 24mm f/3.5 ED
* When not shifted or tilted.
When used with the AF-S NIKKOR 14–24mm f/2.8G ED, the flash will be unable to light the
entire subject at all ranges.
D
AF-Assist Illumination
AF-assist illumination is not available with the following lenses:
• AF-S NIKKOR 14–24mm f/2.8G ED
• AF-S NIKKOR 28–300mm f/3.5–5.6G ED VR
• AF-S DX NIKKOR 55–300mm f/4.5–5.6G ED VR
• AF-S VR Zoom-Nikkor 70–200mm f/2.8G IF-ED
• AF-S NIKKOR 70–200mm f/2.8G ED VR II
At ranges under 1 m (3 ft. 3 in.), the following lenses may block the AF-assist illuminator and
interfere with autofocus when lighting is poor:
• AF-S Zoom-Nikkor 17–35mm f/2.8D IF-ED
• AF-S DX Zoom-Nikkor 17–55mm f/2.8G IF-ED
• AF-S DX NIKKOR 18–105mm f/3.5–5.6G ED VR
• AF-S DX VR Zoom-Nikkor 18–200mm f/3.5–5.6G IF-ED
• AF-S DX NIKKOR 18–200mm f/3.5–5.6G ED VR II
• AF-S NIKKOR 24–70mm f/2.8G ED
A
Calculating Angle of View
The size of the area exposed by a 35mm camera is 36 × 24 mm. The size of the area exposed by
the D3100, in contrast, is 23.1 × 15.4 mm, meaning that the angle of view of a 35mm camera is
approximately 1.5 times that of the D3100. The approximate focal length of lenses for the D3100
in 35mm format can be calculated by multiplying the focal length of the lens by about 1.5.
Lens
Lens
*
Angle of view (35mm format)
Zoom position Minimum distance without vignetting
250 mm 2.5 m/8 ft. 2in.
350 mm 2.0 m/6 ft. 7 in.
200 mm 5.0 m/16 ft. 5 in.
250 mm 3.0 m/9 ft. 10 in.
300 mm 2.5 m/8 ft. 2 in.
350–400 mm
24 mm 3.0 m/9 ft. 10 in.
• AF-S Zoom-Nikkor 80–200mm f/2.8D IF-ED
• AF-S VR Nikkor 200mm f/2G IF-ED
• AF-S VR Zoom-Nikkor 200–400mm f/4G IF-ED
• AF-S NIKKOR 200–400mm f/4G ED VR II
• AF-S VR Zoom-Nikkor 24–120mm f/3.5–5.6G
IF-ED
• AF-S NIKKOR 24–120mm f/4G ED VR
• AF-S Zoom-Nikkor 28–70mm f/2.8D IF-ED
• AF-S NIKKOR 85mm f/1.4G
• AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED
Picture size (35mm format)
(36 × 24 mm)
Picture diagonal
Picture size (D3100)
(23.1 × 15.4 mm)
Angle of view (D3100)
No vignetting
n
171