Nikon NIKKOR 13mm f-5.6 - Manual (Page 8)

FOCUSING
To focus, rotate the focusing ring until the image in the viewfinder appears
sharp and crisp.
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 13mm f/5.6 lens are listed below.
r ■—---- Screen
C am era
------------ A / ' L
B
c
D E
G 1 G 2 G 3 G 4 H I H 2 H 3 H 4
J K P M R T
F 3 m © ©
o
© © m © ®
F 2 m © ©
o
-1
%
© m ©
When the Teleconverter TC-200 is attached to this lens, use the following
table:
A/L B c D E G1 G2 G3 G4 HI H2 H3 H4 J K/P M R T
F 3 ® © © » ® ® ®
F 2 ® © © ® ® ®
©= Excellent focusing
®= Acceptable focusing
The split-image rangefinder, microprism or cross-hair area is dim. Focus on the
surrounding matte area.
0= Acceptable focusing
Slight vignetting (or moiré phenomenon in the case of the microprism) affects the
screen image. The image on the film, however, shows no trace of this.
Blank means not usable.
Note: Light transmission properties vary somewhat with
focusing screen type, thus occasionally requiring exposure
correction to compensate for the combined effects of the
lens/screen/camera combination in use. The numbers listed
in certain columns of the combination table above (i.e.,
— 1 and —'A) denote the amount of correction necessary in
f/stops. To adjust the camera’s Photomic finder for the
indicated f/stop correction, lift and turn the film-speed index
ring until the ASA/ISO value for the film in use is aligned
with the appropriate mark engraved on the ring. In the
example figure shown, ASA/ISO 100 is aligned with the —'A
mark to provide the correction required when using the
Type H2 screen with a Photomic finder-equipped F2 Nikon
camera and mounted Nikkor 13mm f/5.6 lens.
LENS USE
• Due to the unique optical construction and wide picture angle of the
Nikkor 13mm f/5.6 lens, careful planning is required when composing
and shooting. The photographer should check that all unwanted or
distracting elements (e.g., the legs of the tripod, etc.) are well outside the
picture field. More importantly, strong light sources, even those outside
the picture angle, should be eliminated or controlled as much as possible
to prevent ghost images.