Nikon Zoom-Nikkor 35-70mm f/3.5 Manual De Instrucciones página 11

•When the Teleconverter TC-14A is attached to this lens, use the following table;
G3 G4 HI H2
© = Excellent focusing
• = Acceptable focusing
The split-image rangefinder, microprism or cross-hair area is dim. Focus
on the surrounding matte area.
O = Acceptable focusing
Slight vignetting (or moire phenomenon, in the case of the microprism)
affects the screen image. The image on the film, however, shows no trace
of this.
El = Exposure measurement not possible; lens/screen combination permits only
focusing operation.
Blank means inapplicable.
ZOOMING D
By rotating the zoom control ring, the focal length of the lens can be varied con-
tinuously between 35 and 70mm. This enables you to "trim" the composition to
fit the film frame exactly. Once set, the focus does not change regardless of the
focal length used. However, it is recommended that you focus on the maximum
zoom setting (70mm) and zoom back to the preferred composition; since depth
of field is shallowest at longer focal lengths, focusing is made easier. This tech-
nique will assure you of obtaining the maximum image quality that the Zoom-
Nikkor 35-70mm f/3.5 can produce.
DEPTH-OFFIELD SCALE
Unlike other Nikkor lenses, the Zoom-Nikkor 35-70mm f/3.5 has no color-coded
depth-of-field indicators engraved on the lens barrel. However, you can still
determine the depth of field by using the scales on page 25.
To use, first cut out the scales along the lines indicated. Then, place the subject-
distance scale (B) over the depth-of-field scale (A) with the top edge of the B
scale lined up with the focal length in use and the focused distance aligned with
the A scale's central indicator line. Now read off the numbers (on the B scale)
which appear opposite the pair of depth-of-field lines (on the A scale) corre-
sponding to the aperture in use; these numbers express the depth of field for the
settings in use. For example, if the lens is prefocused at 3m (10 ft) with the focal
length set at 60mm and the aperture at f/16, the numbers on the distance scale
opposite the depth-of-field lines for the f/16 setting show that the depth of field
extends from 2m (6.6 ft) to 5m (16.6 ft). You can also observe the depth of field
through the viewfinder by pressing the depth-of-field preview button on the
camera.