Pentax ZX-5N User Manual
Page 56
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Notes on Accessories
The following conditions do not allow autofocusing or
manual focusing with the in-focus indicator in the view
finder. Use the manual focus mode to focus on the sub
ject with the aid of the matte field surrounding the
autofocus frame.
a) When using special effect filters or 'Magic Image
Attachment' or 'Stereo Adapter'.
b) When using Extension Tubes or an Auto Bellows for
close-up photography.
Note on the SMC Pentax F SOFT 85mm f/'2.8 lens
When shooting at a distance closer than approx. 1.5m
(4.9ft), set the lens to a manual f-stop setting between
f/2.8
and
f/4.5.
A
smaller
aperture
(f/5.6
to
f/32)
may cause the autofocus system and the viewfinder's
in-focus indicator to malfunction. To remedy this prob
lem, temporarily set the lens to f/4.5. After focusing
on the subject, lock focus, and set the lens to the re
quired f-stop.
Using A Polarizing Filter
When using an ordinary polarizing filter; the half mirror
incorporated into the autofocus system reduces the ef
fectiveness
of
the
autofocus
function
when
used
in
combination with an ordinary polarizing filter. Use a
CIRCULAR
POLARIZING
FILTER
for
proper
autofocus
operation.
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