Nikon ED - Manual (Page 11)

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 800mm f/8 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 mount­
ing 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, flip 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 dud 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 800mm f/8 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
F3 @ ® @ © © © ® ® ® ®
F2 © ® © © © 6 % ® »
■When the TC-200 teleconverter is attached to this lens, use the following table*:
Screen
Camera
A / L B
c
D E G l G 2 G 3 G 4 H I H 2 H 3 H 4 J K / P M R T
F 3 ® ©
o o
© ® ® ® ®
F 2 ® ©
o o
© ® ® ®
*Vignetting or other performance deterioration may be noticeable in the image
recorded on the film.
■When the TC-300 teleconverter is attached to this lens, use the following table:
Screen
Camera ^
A L B c D E G l G 2 G 3 G 4 H I H 2 H 3 H 4 J K / P M R T
F 3 ® © O
0
© © ® ® ® ®
F 2 ® © O
o
© © ® ®
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