For external power source -

_

For batteries

_

 

inside the controller

 

4. Select and set aperture.

When the S8-21 is powered by batteries inside the controller, usable apertures are indicated by the aper· ture indicator lines (excluding narrow line-end) which intersect the reproduction scale.

When the S8 -21 is powered by the external power source LA-2 or LO -2, usable apertures are indicated by the aperture indicator lines (including narrow line-end).

----

For a high reproduction ratio, use the smallest \

possible aperture for greater depth of field. I

-- -- ---

With the lens in reverse position :

For the desired reproduction ratio, follow the line from the red reproduction ratio scale and read the usable apertures.

For example, when the S8-21 is powered by batteries inside the controller, to obtain a 4x (4 :1) reproduction ratio with ISO 100 film and Micro -Nikkor 55mm f/2 .8 lens in reverse position, use apertures from f/2 .8 to fill .

With lens in normal position:

For desired reproduction ratio, follow the line from the white reproduction ratio scale and read the usable apertures.

For example, when the S8-21 is powered by batteries inside the controller, to obtain a 1: 10 reproduction ratio with ISO 100 film and Micro-Nikkor 55mm 112 .8 lens in normal position, use apertures from f/4 to f/16.

For usable apertures with a reproduction ratio lower than 1: 10, see page 40.

When the S6·21 is powered by external power source:

For example, to obtain 4x reproduction ratio with ISO 100 film and the Micro-Nikkor 55mm f/2.8 lens in reverse position, usable aperture extends to f/2 .8 to f/16 .

I

------ ..._---- ...

\

With the Condenser Adapter SW·S

I

attached:

I

 

The usable aperture range shifts to 1/2 stop I

I smaller. For example, to obtain 4x reproduc-

I

I tion ratio with ISO 100 film and the Micro-

I

I

Nikkor 55mm f/2 .8 lens in reverse position,

I

\ ...

use apertures from f/2 .8+ 1/2 to fill + 1/2 .

 

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36

Page 35 Page 37
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Image 36
Nikon SB-21 instruction manual Select and set aperture, For external power source For batteries, Inside the controller
Page 35 Page 37

SB-21 specifications

The Nikon SB-21 is a highly regarded external flash unit that has earned a reputation among photographers for its versatility and reliable performance. Designed for use with Nikon’s line of DSLR cameras, this compact flash unit is favored by both amateur and professional photographers alike.

One of the key features of the SB-21 is its powerful guide number, which provides robust illumination in various settings. This allows users to effectively light subjects even in challenging low-light environments or larger spaces where additional lighting is essential. The SB-21 also boasts a range of customizable settings, giving photographers control over the intensity and direction of light.

The flash offers a zoom head, which allows it to cover various focal lengths. This adaptability is particularly beneficial for photographers who frequently switch between wide-angle and telephoto lenses. The ability to zoom not only enhances light coverage but also ensures that the flash can be fine-tuned to match the specific needs of each shot.

In terms of technology, the SB-21 integrates Nikon’s advanced i-TTL metering system. This intelligent system measures the light needed for a scene and adjusts the flash output accordingly, resulting in well-exposed images with minimal user intervention. This feature enables photographers to focus on their composition without worrying about manual exposure settings.

The build quality of the SB-21 is another highlight, as it is designed to withstand the rigors of regular use. It features a durable exterior that enhances its longevity, making it a trustworthy tool for outdoor and event photography. Additionally, the flash unit supports wireless operation, enabling users to trigger it remotely for creative lighting setups.

The Nikon SB-21 also includes a variety of accessories, such as diffusion panels and bounce cards, allowing further customization of light output to achieve specific effects.

Overall, the Nikon SB-21 stands out as a reliable and feature-rich external flash unit that meets the demands of various photographic styles. Its versatility, intelligent technology, and robust construction make it an essential accessory for any Nikon photographer looking to enhance their lighting capabilities. Whether shooting portraits, events, or creative projects, the SB-21 delivers exceptional performance and quality, making it easier to capture stunning images in any lighting condition.
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