Preset eocusing, Depth-of-field indicators, Filters c – Nikon NIKKOR ED 1200mm f-11 IF User Manual

Page 11: Recommended focusing screens, Preset eocusing- b, V o o, V “14

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PRESET EOCUSING-

B

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

desired focus setting, and tighten the preset ring locking screw to set the click-stop

position.

DEPTH-OF-FIELD INDICATORS

Depth of field (i.e., the zone of acceptable image focus) can be checked by reading the

color-coded

depth-of-field

indicators

engraved

on

the

lens

barrel.

The pairs of colored

lines on either side of the white distance scale index line correspond to f/numbers of

the same color on the aperture scale. You can also observe the depth of field through

the viewfinder by simply pressing the depth-of-field preview button on the camera body.

FILTERS--------------------------------------------------------------------------------------------C

The Nikkor ED 1200mm f/11 IF uses standard Nikon 39mm screw-in filters mounted

on a filter holder which is inserted into the body of the lens just behind the tripod

mounting collar. To gain access to the filter holder for filter changing, press and turn

the knob on the filter holder 90° counterclockwise until the white line on the knob is

at right angles to the axis of the lens. The filter holder will come free and can be lifted

out of the lens. Unscrew the filter and replace it with the one you wish to use. Lock

the filter holder back in place by reversing the above procedure. A special filter holder

is provided with this lens which accepts gelatine filters. To fit the filter, release the

catch, nip open the filter plates, insert the gelatine filter, close the plates and cut off

the excess with a sharp knife. The filter holder can then be mounted in the usual way.

Please note that due to a slight difference in thickness between gelatine and glass filters,
some focus shift may occur when changing from one type of filter to the other; this

discrepancy is easily corrected, however, by slightly shifting the focus setting. A filter

must be mounted in the lens at all times.

RECOMMENDED FOCUSING SCREENS

Various interchangeable focusing screens are available for F2 and F3 Nikon cameras to

suit any type of lens or picture-taking situation. Those which are recommended for use

with this Nikkor ED 1200mm f/11 IF lens are listed below.

Screen

Camera —^

A L

B

c

D

E

G1 G2 G3 G4 HI

H2 H3 H4

J

K P

M

R

T

F 3

@

$

@

@

O

@

s

s

m

F 2

O

S'

@

©

©

s

I When the Teleconverter TC-200 is attached to this lens, use the following table*;

——___ Screen

Camera ^^

A L

B

c

D

E

G1 G2 G3 G4 HI H2 H3 H4

J

K P

M

R

T

F 3

f;

@ O o

©

#

® ®

F 2

-Vi

©

-V o o

©

- V

“14

®

-V

*Vignetting or other performance deterioration may be noticeable in the image re­

corded on the film.

11

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