Nikon AF-S DX Micro- NIKKOR 40mm f-2.8G: ■ Changes to the Effective f-number ■ Built-in Flash Units ■ The Lens Hood
■ Changes to the Effective f-number ■ Built-in Flash Units ■ The Lens Hood: Nikon AF-S DX Micro- NIKKOR 40mm f-2.8G
Table of contents
- For Your Safety
- ■ Parts of the Lens
- ■ Attaching and Removing the Lens ■ Focus
- M/A (Autofocus with Manual Override) ■ Aperture ■ Depth of Field
- ■ Reproduction Ratio ■ Close ups and Reproduction Work ■ Exposure Factor
- ■ Changes to the Effective f-number ■ Built-in Flash Units ■ The Lens Hood
- ■ Lens Care ■ Supplied Accessories
- ■ Compatible Accessories ■ Specifications
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■ Changes to the Effective f-number
With this lens, the higher the reproduction ratio (the shorter
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the focus distance), the darker the image that falls on the
image sensor and the higher the effective f-number (see the
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figure on page 162).
The camera automatically compensates
for this effect when metering exposure or adjusting flash
Fr
output using TTL flash control, and shows the adjusted value
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for aperture in the control panel and viewfinder displays.
■ Built-in Flash Units
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When using the built-in flash on cameras equipped with a
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built-in flash unit, shoot at ranges of 0.6 m (2 ft) or more and
remove the lens hood to prevent vignetting (shadows created
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where the end of the lens obscures the built-in flash).
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■ The Lens Hood
The lens hoods protect the lens and block stray light that
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would otherwise cause flare or ghosting.
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Align the lens hood lock mark (—{) with the
lens hood mounting mark (●) on the lens
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(e).
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When attaching or removing the hood, hold it near the
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symbol on its base and avoid gripping it too tightly.
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Vignetting may occur if the hood is not correctly attached.
The hood can be reversed and mounted on the lens when not
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in use. When the hood is reversed, it can be attached and
removed by rotating it while holding it near the lock mark (
—
{
).
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Kr
Id
17
