Advertisement
1-2
SPECIFICATIONS
TYPE
Large
format single-reflex
camera
with interchangeable
lenses.
FILM SIZE
120 roll film ( 10 exposures )
220 roll film ( 21 exposures )
PICTURE
SIZE
55 mm
x 69 mm
EXPOSURE
COUNTER
Automatic
re-set
type
FILM
TRANSPORT
AND
SHUTTER
COCK
Single
stroke
rapid wind lever with rotation angle of 180 deg.
plus pre-advancing
angle of 10 deg..
SHUTTER
Electronically
time-selecting focal-plane
shutter with rubberized
silk curtains.
Speeds
1, 1/2,
1/4,
1/8,
1/15,
1/30,
1/60,
1/125,
1/250,
1/500,
1/1000 sec.
and X.
Speed light synchronization
X, equivalent to 1/30 sec.
Time lag
60 milli sec.
POWER
SOURCE FOR ELECTRONIC
SHUTTER
6V silver battery (Eveready #544)
VIEWFINDER
Detachable
eye-level and waist level viewfinders
Viewfinder
format
area
ratio
100%
waist-level
90%
eye-level
Ground
glass and Fresnel
lens
Combination
of microprism
center and fine ground glass
Viewfinder
magnification
Approx.
1 with f=105 mm
lens and pentaprism
viewfinder
Visual image distance
( pentaprism
viewfinder
)
Approx.
1 M from the eye-point
DIAPHRAGM
Fully automatic
for 35 ~~ 300 mm
lenses
pre-set
for over 300 mm
lenses
LENS
MOUNT
Double bayonet
Inside
bayonet
for 35~300 mm
lenses
Outside bayonet
for over 300 mm
lenses
WEIGHT
2.3 Kg with f= 105mm
standard
lens
and pentaprism
view-
finder.
1-3
FEATURES
Pentax 6/7 is a large format (55mm x 69mm) SLR with electronically
time-selecting focalplane
shutter.
Detachable
eye-level or waist level view-
finders are available.
The electronic
shutter
consists
of shutter
curtains, electronic
circuit,
ele-
ctromagnet
and other mechanism.
It controls
the slit opening
of the shutter
curtains
which determines
exposure
time.
The electromagnet
contains
a
dual solenoid (or coil ) for better
stability of its transfer function,
electrical
to mechanical.
A safety system
quenches
the shutter
operation if any malfunction due to
low battery or faulty circuit has appeared, and the film on the frame
remains
un-exposed.,
Refer
to Chapter 2 for details.
Power
switch is invisible from outside,
It turns
on automatically
only
Advertisement
