Pentax 6x7 User Manual

• MANUAL DIAPHRAGM LENSES -----------
it will lock on manual (MAN .). To re -engage
the automatic
diaphragm , press on the lever
again and let go so
that the lever returns to
the AUTO position.
MANUAL DIAPHRAGM LENSES
SMC TAKUMAR
SMC TAKUMAR
SMC TAKUMAR
400mm f /4
600mm f /4
800mm f/ 4
67 lenses from 400mm through 800mm
telephoto (except 500mm f / 5.6) feature a
manual
diaphragm which is stopped down by
rotating
the aperture ring to the various
click-stop f-
number settings. This method is
used
with all long telephoto lenses, except
the
1000mm reflex telephoto which does not
employ a diaphragm . When using manual
diaphragm lenses, focus
with the lens set at
maximum aperture, and
then stop it down to
shooting aperture just before tripping the
shutter.
Preset Diaphragm
The SMC Penta x 75mm shift lens features
a preset
diaphragm system, whereby the
shooting aperture is preset with a preset
ring,
so focusing and composition are per-
formed at full-aperture. Then, the aperture
is
stopped down for exposure metering and
shooting by turning the aperture ring until it
matches up with the preset ring, (Operating
details are given in
the instruction manual
furnished
with the lens.).

Pentax 6x7 Specifications

General

Lens Mount	Pentax 6x7 bayonet mount
Shutter	Focal plane shutter
Shutter Speed Range	1 to 1/1000 second + Bulb
Metering	TTL Metering (with metered prism finder)
Flash Sync	1/30 second (FP sync available)