Nikon Nikkor ED 800mm f/8 IF Instruction Manual - Page 10

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Nikon Nikkor ED 800mm f/8 IF Instruction Manual

NOMENCLATURE

1 Built-in telescopic lens hood

2 Preset ring alignment index

3 Preset ring locking screw

4 Tripod collar locking screw

5 Tripod collar alignment indexes

6 Insertion-type filter holder

7 Built-in rotatable tripod mounting collar

8 Shoulder strap eyelet

9 Focusing ring

FOREWORD

Belonging to a new generation of super-telephoto lenses, the Nikkor ED 800mm f/8 IF

offers unparalleled image quality and handling ease, plus automatic diaphragm operation.

The use of Extra-low Dispersion (ED) glass in the lens design drastically reduces chro-

matic aberration (i.e., the inability of a lens to bring all wavelengths of visible light,

especially red and blue, into the same plane of focus). The result is images that are

crisp and virtually free of "color fringing" even when the lens is used wide open at its

maximum aperture.

Nikon Integrated Coating (NIC) is applied to the surfaces of lens elements to reduce

flare and improve contrast and color rendition.

For improved handling, this lens utilizes Nikon's Internal Focusing (IF) system, in

which the lens elements are moved internally. Without the traditional focusing helicoid,

there is no increase in the overall length of the lens as it's focused closer; thus, it is

much easier to hand-hold. In addition, the lens is lighter and more compact than pre-

vious models at the same focal length. Other convenient features include a built-in

telescopic lens hood, built-in tripod mounting collar, presettable focusing ring for

rapid refocusing to a certain distance, and full aperture through-the-lens metering with

Al-type Nikon and Nikkormat cameras*.

The ED 800mm f/8 IF has special insertion-type filter holders accepting either 39mm

screw-in or gelatine filters-the same type used with the Reflex-Nikkor 500mm f/8 and

1000mm f/11. Because of its long focal length, this lens is perfectly suited for a wide

variety of situations, including photojournalism, sports and wildlife photography, as

well as taking pictures of the sun and moon itself.

* When using this lens with non-AI cameras, exposure should be measured by the

stop-down method. (For details, refer to your camera's instruction manual.)

MOUNTING ON A TRIPOD

For maximum picture sharpness and freedom from camera shake, the use of a tripod

is recommended at all times. The Nikkor ED 800mm f/8 IF is incorporated with a

sturdy, full rotatable (360°) built-in tripod mounting collar for just such purposes.

To attach to the tripod, position the collar tripod socket on the tripod screw and

tighten. To rotate the lens (with attached camera) for vertical or horizontal format,

loosen the collar locking screw, rotate the lens to the desired position, and retighten

the locking screw to secure the assembly. For convenience while positioning, index

marks are provided at 90° intervals around the tripod collar.

PRESET FOCUSING

The focusing ring is fitted with a special ring for use when rapid refocusing to a specific

object distance is desired; the click-stop action of the ring enables operation "by touch"

for greater speed. To preset the lens, loosen the preset ring locking screw, rotate the

focusing ring as far as it will go in either direction, turn the focusing ring back to the

Distance scale

Distance scale index

Aperture index dot

Aperture indexing post for Nikon SB-E Speedlight

Meter coupling ridge

Aperturc-direct-rcadout scale

Aperture ring

Aperture scale