Numbers in brackets refer to Main
Pictures
To the fortunate
owner of the Pentina
A single-lens miniature reflex camera
designed on the base of first-rate technical experience,
is now to be your companion: the Pentina.
You must really learn to know your
camera thoroughly from the very beginning in order to be
able to utilize its abilities regarding the automatic
exosure control, the central shutter, interchangeable
lenses etc. That is why we advise you to make yourself
fully acquainted with your Pentina before inserting the
first film. When you have learnt to understand its
ingenious functioning, the camera will never disappoint
you, even in the most difficult of situations.
The Pentina features not only
automatic exposure control, it also offers the user the
advantage of deciding himself which aperture and shutter
speed will comply with his needs. This means that
automation in the Pentina is not dominating but will
always submit to your special wishes. This is the reason
why the Pentina is held in such high esteem.
Inserting the
Film
Pull open lock (20) of camera back and
remove the back. Pull out the rewind knob (19) and, after
having inserted the film cartridge, push the knob in
again. Pass the film leader across the picture gate,
insert it into the slit of the receiving spool, making
one of the perforation holes engage with the little pilot
pin.
Should the slit in the spool not be
visible, turn the knurled part of the spool to bring it
into the right position. With the film thus fixed into
the spool, wind it on by actuating the cocking lever. The
film has to be advanced until the sprocket wheel catches
both of the perforation edges. Set the picture counting
mechanism on number 38 by movement of the setting lever
(27), replace the camera back and fasten the lock.
Actuate the cocking lever (26) twice and release the
shutter each time, whereupon the counting mechanism will
arrive at 0. Cock the shutter once more by means of the
lever (26), and the camera is ready for the first
exposure.
One stroke of lever (26) cocks the
shutter and transports the film. At the same time the
diaphragm automatically opens to the widest aperture. On
release of the shutter, the diaphragm closes down to the
value indicated by the light meter.
Film Reminder
Dial
On the base of the camera is a disk
with symbols indicating the types of film. The symbol
required has to be set against the notch.
Automatic
Exposure Control
The film speed is set on the bottom of
the camera when the film is inserted. This is done by
rotation of the milled knob (18) to the left or right.
The scale is graded from 9 degrees to 33 degrees DIN and
6 to 1600 ASA. First turn the speed setting ring by means
of lever (8) to the exposure speed number which appears
to be the most favourable for the object to photographed,
for instance 1/60 second.
The direct the Pentina towards the
object, thus enabling the photo-sensitive cell of the
built-in exposure meter to measure the light conditions.
The meter needle in the window (1) moves accordingly. By
turning the diaphragm lever (9) you bring the follow
pointer to coincide with the meter needle. The correct
light value, i.e. combination of aperture and shutter
speed, is thus obtained. This lever (9) may also be
called a light value lever. If, when setting the
diaphragm, you have arrived at the widest aperture
without bringing the meter needle and the follow pointer
to coincide, you may continue turning the diaphragm lever
(9) which in its turn takes the speed setting lever (8)
along up to where the pointers meet, in this way adjustng
the exposure speed.
Should the diaphragm value prove
unfavourable with regard to the depth of field required,
another combination of aperture and shutter speed has to
be determined by movement of the combination lever. If
the meter needle remains in the white section of the
window - a sign that the light is too dim - the B setting
has to be used, in which case the automatic mechanism is
locked out. Thus the automatic mechanism of the Pentina
also allows for perfectly individual programming. since
exposure speed and diaphragm may be adjusted
separately.
Very contrasty objects may lead to
faulty results in measuring. It is, therefore, advisable
in such cases to approach the object as closely as
possible and to take the reading on the most important
areas (short-range measuring). When reading the light
meter on wide extensions of skylight, incline the camera
slightly downwards to avoid faulty measuring and
subsequent underexposure.
If you are using filters, remember to
take the filter factors into account which are given by
the filter manufacturers. In the Pentina, the filter
factor is balanced out by a decrease in the film speed or
diaphragm value to be set in the camera:
|
Filter factor
|
Decrease in film
speed
|
Decrease in diaphragm
value
|
|
1.5
|
2 DIN
|
0.5 stop
|
|
2
|
3 DIN
|
1 stop
|
|
2.5
|
4 DIN
|
1.3 stop
|
|
3
|
5 DIN
|
1.5 stop
|
Focusing and Picture
Composition
In the Pentina, as a single-lens
reflex camera, the image produced by the taking lens is
directed by a mirror swung into the path of rays to the
lower, ground-glass, surface of the image field lens,
where it becomes visible to the eye looking into the
viewfinder (28). On base of this image you focus your
subject and compose your picture. By turning the focusing
ring (10) on the lens mount either to the left or to the
right you are able to obtain maximum sharpness of the
viewfinder image.
Attention! Do not mistake the lens
locking ring (13) for the focusng ring (10).
The distance thus focused is shown on
the distance scale of the ring (10).
The depth-of-field scale reveals the
range of sharpness obtainable by the distance setting in
combination with the various diaphragm apertures (e.g.
distance setting 1.5 metres (5 ft.) and aperture 22
yields a range of sharpness reaching from approx. 1 metre
(3 ft. 4 ins.) to 3 metres (10ft.))
Should your Pentina be equipped with a
rangefinder lens instead of the plain image field lens,
you will be able to focus in the same manner as with a
split-image rangefinder. In a circular clear-glass area
of the field lens are two optical wedges transposed by
180 degrees. Their horizontal dividing line passes across
the center of the clear glass field. During focusing, two
part images in the measuring field move towards, or away
from, each other. The image is in correct focus as soon
as the two parts meet. If possible, focus on lines
standing at a right angle to the dividing line of the
measuring field. The clear glass measuring field has a
diameter of only 6 mm. and, if necessary, the sharpness
can also be checked on the ground glass area.
The
Shutter
The Pentina is equipped with a special
type of central shutter, coupled to the automatic
exposure mechanism and giving instantaneous speeds from 1
sec. to 1/500 sec. Also the B setting is provided, at
which the shutter remains open as long as the release
knob is being depressed. The shutter may be released by
hand, by a cable release, or by means of the
delayed-action device. The delayed action is set by
movement of lever (15) to V (16). The delayed-action
setting works automatically with the X synchronization.
Please pay attention to the directions for using the X
contact.
Rewinding
After the complete film has been
exposed, it has to be rewound into the cartridge. First
pull out crank (19), turn the spindle through 180 degrees
and fit it into the recess. Depress the release knob (22)
of the sprocket with your middle finger and rotate the
crank (19) in the direction of the arrow.
A soft scraping sound of the film
slipping off the receiving spool (29) indicates that the
exposed film is rewound into the cartridge. The camera
back may now be removed and the film taken out of the
camera.
Changing
the Lenses
All Pentina lenses are fitted with an
automatic diaphragm release. The lenses are
interchangeable by means of a bayonet fitting. By turning
the lens locking ring (13) anti-clockwise as far as it
will go you unlock the lens and are able to take it out
of the camera. When replacing the lens, make sure that
the little pin on the bayonet mount fits into the recess
of the lens seat. Turn the milled lens locking ring
clockwise to fasten the lens in place.
The standard lens of the Pentina is
the 50 mm. Jena T, f/2.8, whilst the following
interchangeable lenses are available:
Meyer Lydith 30 mm.
f/3.5
Jena Cardinar 85 mm.
f/2.8
Meyer Domigor 135 mm.
f/4
Flash
Synchronization
X-Contact
Applicable for electronic flash and
bulbs. Electronic flashes may be synchronized at all
shutter speeds up to 1/500 sec. With flash bulbs, the
shutter has to be set for 1/30 sec. or longer. Details
concerning the individual shutter speeds are contained in
the manufacturers' instructions for using the various
types of bulbs.
M-Contact
Applicable for flash bulbs of the M
class, but not for electronic flash. Please note the
directions given by the lamp manufacturers. The different
contacts, X, M, or V (delayed action), are set by means
of the lever (15) either before or after the shutter is
cocked.
The
Guide Number Calculator
On the lower side of the two shutter
rings are two scales moveable in relation to one another.
These scales indicate the distance between flash bulb and
object (m), and the guide numbers (Z). In flash work,
this guide number calculator (17) helps you, on the base
of a certain guide number, to find the correct aperture
for the exposure. You need only to set the distance
figure (distance from flash bulb to object) against the
guide number indicated for the flash bulb, and the
aperture required is automatically set, because the
diaphragm and distance scales of the guide number
claculator are arranged on the same ring.
Close-up
Exposures
Close-up exposures are possible with
the help of attachment lenses. The Pentina, as a
single-lens reflex camera, is especially suited for
close-up work, since finder image and negative are of the
same size and the finder image allows for accurate,
parallax-free focusing.
Details are given in the following
table.
|
Attachment Lens
(diopters)
|
Distance Setting of Lens -
meters
|
Distance Setting of Lens -
ft. ins.
|
Distance from attachment lens
to object - mm.
|
Distance from attachment lens
to object - ft. ins.
|
Picture Ratio
|
|
1
|
0.50
|
1.8
|
330
|
1.1
|
0.16
|
|
1
|
infinity
|
infinity
|
1000
|
3.4
|
0.05
|
|
2
|
0.50
|
1.8
|
250
|
0.10
|
0.22
|
|
2
|
infinity
|
infinity
|
500
|
1.8
|
0.10
|
|
3
|
0.50
|
1.8
|
200
|
0.8
|
0.27
|
|
3
|
infinity
|
infinity
|
340
|
1.1
|
0.15
|
It is not necessary to prolong the
exposure time when using attachment
lenses.
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