Film cameras
ALPA 11Si User manual
User manual for ALPA 11Si. 20 pages in English. Read the original PDF, download or print a copy without registration.
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- Brand
- Alpa
- Model / document
- ALPA 11Si
- Document type
- User manual
- Language
- English
- Pages
- 20
- File size
- 8.4 MB
- Category
- Film cameras
- Document date
- Not specified in catalog
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Instructions
for use of the
ALPA 11 el
Poor results or even damages are often Replacing the delicate galvanometer with
caused by ignorance of the equipment. quivering needle, this shockproof meter
We strongly recommend that you study gives you easier, faster, more sensitive
these instructions carefully, so as to get and far more precise exposures-up to
the best results with your ALPA. 1/1Oth of an f/stop - and eliminatesMost of the instructions apply also to the most meter repairs.
ALPA 11s, with exception of the sections The ALPA body is a light-weight, com-
about release lock, selftimer, pact die-cast of great strength and long-
mirror lock, and M synchro- lasting rigidity. The ALPA 11 el has a
nization. pentaprism for eyelevel viewing, and an
The ALPA 11 el and the unlimited ALPA instant-return mirror which reacts even
system of photography are the results of if the shutter release is kept depressed.
more than 30 years of research and devel- Any slight vibration accompanying the
opment to meet the evergrowing demands return occurs only after the exposure is
of the creative photographer, as well as completed, and cannot affect the sharp-
of scientific and industrial photography. ness of the picture. A film-type reminder
is on the back of the camera (F,tig.12).
All controls are easily accessible and can
be operated even if wearing gloves.
Every feature has been planned for fool-
proof operation.
A. GENERAL DESCRIPTION
The Swiss ALPA 11 el is a 35 mm single- B. EXTERNAL CONTROLSfens ref lex camera (24x36 mm, 18x24
mm or 17 x22.5 mm) with through-the-
lens light matching meter. The precise,
shockproof solid state electronic circuit 1) Winding the film
has six transistors, a yellow light for over
and a red light for under exposure, visible
both below the groundglass and on top The winding lever A (fig. 1) cocks the
of the ALPA. shutter, advances the film, and counts theView original page 4Page 5 · Read text
The speed may be set whether or not the
shutter is tensioned. The range of speeds,
evenly spaced, is the standard: B, 1, 1/2,
1/4, 1/8, 1/15, 1/30, 1/60, 1/125,1/25O,
1/500,1/1000 sec. B may be locked for T
time exposure. To keep the shutter open,
the release lock V (fig.2) must be moved
to its innermost position.
Setting B allows you to make time exposu-
res of any length, the shutter staying open
as long as the release button is pressed
(D, fig.2). A cable release with locking
screw is very useful for long exposures,
and when the equipment is on a tripod.
The release button should also be locked
in position B with shutter open, if any
special shutter is used instead of the focal-
plane shutter of the camera.
lmportant: when long shutter speeds are
used, for example 1 sec, with automatic-
diaphragm lenses, either the shutter
release must remain pressed throughout
the exposure, or the automatic diaphragm
must be disconnected.
The speed 1/60 sec is marked in red
because it is the fastest speed which will
synchronize with electronic flash; if any
faster speed is used only part of the frame
willbe exposed.
Fig. 1 The shutter speed is, of course, chosen to
take into account any movement of the
subject. Factors to be considered include
the speed, distance, and direction of
movement of the subject; the focal length
of the lens used is also important, as is the
way the camera is being supported. Forexposures. The short travel of only 160" maximum sharpness, use as short a speed
and operation of the three separate func- as possible.tions give a slight resistance. lf the lever
is not wound fully to its stop the shutter
release is blocked. Remen'lber, therefore,
to move the lever fully round (but without
forcing it).
3) The shutter release
2) Setting the shutter speeds
To set the shutter speed turn ring P (fig. 1 ) The release button D (fig. 2) is situated
to the required speed, shown by the red on the front of the camera. The finger
line of the transparent disc, without going squeezes the button while the thumb
past the black sector (do not force it). presses against the other side of the ALPA.View original page 5Page 6 · Read text
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Digitally signed by mike butkus
DN: cn=mike butkus, mike o=orphancameras, ou=29,
email=mike@butkus.org, c=US
Date: 2019.08.26 19:49:02 butkus -04'00'
Fig.2
This arrangement minimizes risk of camera very short focal lengths for example). To
shake. The thread in the release button do this, simply slide down knurled lever E
takes a standard cable release. Lenses with (tis.2).
automatic diaphragm have their own Double or multiple exposures are made as
release buttons which in turn depress that follows: after the first exposure press the
of the camera. When taking a rapid succes- shutter release while winding (to tension
sion of pictures, if this button is not the shutter without winding the film), letreleased before winding, the film will the shutter release go f irst, then the winding
not.be advanced, and the last exposure lever, raise the mirror by means of E, andmade will be spoiled by another, partially make thesecond exposure. Do notforgetto
fogged because the mirror will not have move E back again afterwards to lower
returned. the mirror for viewing.The shutter lock V (fig. 2) in its inside
position blocks the shutter release while
light readings are made. lf a cable release
is fitted the lock is not effective.
Note: if the release button is pressed very 4) The self-timer
slowly the mirror may flip up before th6
actual exposure is made. This does not
affect picture quality. The ALPA 11 el has a self-timer (R, fig 2).
It is sometime useful to be able to lock the This delayed-action release can bs set
mirror in its raised position (when using according to the length of delay required.View original page 6Page 7 · Read text
Fis. 3
2,5
5
lf the lever is moved fully round the delay synchronization sockets (fig. 2). The upper
is about 18 secs; if moved only 90o the contact XF is for electronic flash at speeds
delay is about 6 secs. up to 1/60 sec; a shorter speed than this
First wind the shutter, then the lever R. will give only a partially exposed frame.
The delayed action is started by pressing This contact can also be used for special
the shutter release button. lf you wish to short-peak f lashbulbs, but if these are used
be in the picture, you have time to take the manufacturer's instructions must be
up position. followed carefully as this kind of bulb is
lmportant: when using the self -timer with really disigned for between-lens shutters.automatic-diaphragm lenses, the lens The lower M contact is for use with flash-
must be used pre-set or the picture will bulbs specially made for focal-plane
be taken at full aperture only. lf the self- shutters; their long peak allows short
timer is used with the shutter set at B, shutter speeds.
the exposure time will be 3 secs. This
known exposure can be very useful under
poor light conditions or with small
apertures.
The smooth release of the self-timer is
useful also if you have no cable release.
Use a fast speed in such circumstances for
photographing in difficult conditions
without risk of camera shake. C. FRAMING AND
lf the self-timer has been set but is then not FOCUSI NGrequired, it can be disengaged by shutter
lock V and then keeping button D pressed
while lever R is allowed to return to its
original position.
1) Framing
5) Flash synchronization
The image of the screen is reinverted and
The ALPA has two standard co-axial measures exactly 23x35 mm, i. e. Tz mmView original page 7Page 8 · Read text
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less on each side than the 24x36 mm the middle of the screen. Choose a definite
frame. This matches the window of slide detail in the subject and focus the lens
mounts, so that there is no cut-off in pro- u ntil th.e image of the line across the range-
jection. The image on the screen of'the finder is.in perfect alignment; the subjict ALPA half frame cameras measures is. novy sharply focused (figs.3 and 4). exactly 18x24 mm or 17x22.5 mm. The clear ring helps yo'u 1o identify the The screen . i.r.gg is magnified, to give object you are focusing on. In photo- trte-stze wrth the standard 50 rmm mic.rography the aerial image is focused lens, and even with small diaphragm and it is necessary to see it-clearly at the openings the entire image is bright into same time as one of the lines is, -'that the corners - most useful-for composition, without parallax (fig. ). focus, depth-of-field. Both semi-circular prisms aopear will An.optional 0.7 x eyepiece reduces magnifi- uniformly bright under normal conditibns.
catton, so that persons with deep-set eyes Under certain circumstances (smaller lens
or wearers of glasses can see the entire a,pertures, close-up photography) one of field. Even with small f/stops,'etc. telephoto the semi-circular prisms may appear to be
lenses and bellows or tubes, shaded. In this case you can'ilign your
The viewfinder has a rotatable bayonet- image between the other, briqht Srism of mounted rubber eyeshield cup which the split-image and the clear q'[ass'rinq.
excludes extraneous light, and which can The scales indicated by the croiss are uieful
be replaced by a magnifier or a right-angle for comparison (figs. 3 and 4), especially
viewfinder. In photomacro- and micrography. People with eyesight needing correction
can fit special lenses into a mount fixed in
the eyepiece. The powers available are:
-4, -3, -2, -1, +1, +2, +3, and +4 diopters. b) by microprism
Microprisms are actually a large number of
small rangefinders which show clearlv the
smallest mistake in focusing; as long as
the focus is wrong the image is -very
blurred. As soon as the focuJ is correct
the image snaps into clarity.
2) Focusing on the screen
The ALPA 11 el has a screen which
combines a split-image rangefinder with
a circular zone of microprisms. The lens isfocused by means of the ring which turns 3) Focusing by distance scale
the lens in its helical mount. Sharpness is
controlled over all the screen by means of
one of the systems mentioned below. AIIALPA lenses are calibrated for distance.
It is thus possible to select a certain distance.by .t/sing the scale (for example w-hgn using f lash). Estimating.the distance
a) by rangeiinder of the subject, it is set on the scale, taking into account the depth of field. Thi;
method is useful when it is impossible toThe groundglass screen has a built-in focus, either when there is no iime (as atrangefinder formed by a pair of prisms a sporting. event) or if it is too dark (whenwhich appear as a pair of semi-ciriles in using f lash etc. ) .View original page 8Page 9 · Read text
D. TOADING AND
UNLOADING
1) Loading
The ALPA 11 el is opened by the key M
(fig. 5), on the bottom of the camera. Lift
the key and turn it to the right (fig.5).
Remove the back by pulling on the key.
Hold the film cassette in the right hand and
insert the film leader in the slot of the
take-up spool (fig.7). Take care to push
the film well into the slit marked with an
arrow so that the edge is against the lower
Fig. 5 flange of the spool; the leader is held by
a tooth. Pull out enough film to enable the
cassette to be put in its chamber, and
engage the rewind lever into the cassette
(fis.8).
Fis. 6
Remember to check the correct
winding before closing the camera.
Replace the camera back and lock it by
turning r16s key to the left; wind and
release the shutter two more times while
noting that the central screw of button F
(fig. 2) is turning while the shutter is
being wound.
The frame counter C (fig.7) is automatically
disengaged when the camera back is
removed. lt advances to zero after three
windings of the film as mentioned above.
Note: if a partly exposed film is removed
from the camera, the number of exposed
frames should be noted before opening
the back, so that the film can later be
inserted without loss of a frame.
Do not forget to set the film speed on the
exposure meter; depress the outer ring of
the speed dial P (fig. 1) and turn the black
index mark until it is opposite the ASA
speed of the film (f ig. 1 0). For easier setting
of the speed the dial can be put to one end
of its scale.View original page 9Page 11 · Read text
2) Rewinding the exposed film
When the frame counter shows 19 or
35 exposures (according to the film
loaded), wind to the next frame carefully
to avoid tearing the perforations or pulling
the film from its cassette altogether - this would make rewinding impossible. When
definite resistance to winding-on is felt
the film is used up and is rewound after
pressing the rewind release knob O
(fig. 6) which disengages the sprockets.
It is not necessary to keep your finger on
this button. Pull out the rewind crank F
(fig. 2) and turn in the direction of the
arrow (fig. 10). The film will offer a slight
pull against the rewind, until suddenly the
crank begins to turn freely. The camera can
then be opened and the cassette removed.
Take care not to press the rewind knob
except when rewinding. lf pressed by
mistake during exposure of a film, advance
Fig. 10 the film one frame to re-engage the
sprockets,
Fig. 11
E. ALPA LENSES
1) Ghanging the lens
To change the lens, press the button O
(fig. 2) and turn the lens to the left.
Position the new lens so as to line up the
two red dots, push it gently into the body,
and turn to the right until it clicks into
position.View original page 11Page 12 · Read text
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2) ALPA lenses
ALPA have chosen an incomparable The transistorized circuit receives informa-
range of lenses from the best manufac- tion from two Cds cells which measure the r:urers Kern, Kinoptik, Angenieux, light coming through the lens, while a
Schneider, Zoomar and Zeiss. third cell compensates for any stray light
Each lens is individually factory-tested by entering the system through the viewfinder.
ALPA to very rigorous standards. Focal The electronic circuit lights the lamps:
lengths available range from 24 to 600 mm, yellow indicates overexposure, red under-
and their bayonet mounts have remained exposure. When both lamps are lit at once,
standardized for more than 20 Vears. exposure is correct. The two cells integrate
Among this selection of lensbs are two readings from the screen, with center
designs which are exclusive to ALPA - the weighting, to give highly accurate exposurefamous Kern Macro-Switar f 1.9/b0 mm co ntro l.
(the standard lens of the ALpA), and the
Kinoptik APOCHROMATS.
2) Methods of use
Two methods are possible
a) The shutter speed is set, depending on
F. EXPOSURE READINGS thefilm subjectspeed when(fig. 1).changingRememberfilmsto (fig.6).sef the
Lock the shutter release by sliding lever V
towards the lens. Press the shutter release
(D) to allow the meter and diaphragm to
operate. While keeping pressure on the
release turn the aperture ring u ntil the
lamps visible in the viewfinder and in the
accessory clip are both lit.
lf the subject is in focus, just slide back the1) Basic principles lock V and take the picture.
Note: in its outermost position the lock V
makes the meter inoperative but allows the
shutter to be released (useful for repeated
exposures of an identical subject).
ln the center position the meter ope-
The meter system has a very wide ranqe of rates at half pressure on the shutter
sensitivity (1.6 - 400,000 a'sb). Curre-nt is release, which also operates the automatic
9lpplied. by one Mallory PX 28 battery diaphragm, and the shutter is released at
(Eveready 544). full pressure.View original page 12Page 13 · Read text
In the innermost position, next to the lens, When reading the meter in the accessofy both the shutter and the meter are blocked. clip, it is gbod practice to cover the
This last position allows the shutter to be vidwfinder with the hand or a lenscap. kept open after it has been released: open ln other circumstance, to keep out un- intense th6 shutter at B setting, and slide the lock wanted light when working in
toward the lens. The shutter is closed again illumination, the smallsliding cover for the
after the exposure simply by sliding the meter-window, on top of the camera, may
lock back again. be closed (G, fig. 12).
Note: if the release button is kept depres-
sed with the lock as just described, while
the shutter is tensioned, the blind stays open
fully at shutter settings between 1/30th
and B, and partially so at all other settings.
b) The aperture is first set, according to
opening, the Choose of field. required depth
press the 4) Direct meter readings V, then with shutter bldck the
release and find the correct time by turning
the speed dial. Slide back the lock, check
the focus, and take the picture.
Note: remember the cells are very sensitive
and that to get both lamps lit at once may Film speeds Range of shutter speeds
require the diaphragm to be set at an ASA DIN fastest slowest
intermediate stop value. The shutter can
be released if one of the lamps is not fully lit: at some light levels the system is so 3 (6 1/60 1 second
D sensitive that it may be difficult to get both 6(ASA) (s 1/125 1 lit. The error in such case will not exceed 12 (12 1/250 1 ) 1/5 to 1 /1Oth of an f -stop I 25 (15 1/500 1 ) 50 (18 1/1000 1 ) 100 (21 1/10OO 1/2 )
200 (24 1/1000 1 /4 )
D 400 (27 1/1000 1 /8 800 (30 1/1000 1 /15 ) 1 600 (33 1/1000 1/3o D
D 3200 (36 1 /1000 1 /60 6400 (3e 1/1000 1/125 >
3) lmportant note
lf the speed required is outside the scale
Another point to remember is that, like registered by the system it is easy to the human eye, the cells have to get used estimate it because ASA ratings are
to darkness and are "blinded" by very directly proportional to shutter speeds intense light, so that they continue to and f stops (except for a few maximum
register it for a short time. Therefore when apertures on certain lenses).
passing from a very bright subject to a dark For example, if an exposure ot'l /1000 sec
one. allow the meter to rest for a few is required with a 25 ASA film a direct
seconds. lntentional over- or under- reading will not be obtained - the fastest exposure is, of course, always possible. speed for this film is 1/500 sec. lf the The eye should be kept as close as possible correct stop at 1/500 sec was, say, f 5.6,
1 /1000, to the eyepiece during exposure readings the shutter speed is halved to
(especially if wearing glasses), to minimize therefore the aperture must be doubled,
the effects of stray reflections entering the tof4.
viewfinder. lt is well compensated for by Sometimes 1 sec on the speed dial is not
the third cell but this compensation might long enough: in this case the film setting
be insufficient in extreme circumstances. can be altered instead of the shutter speed.
10View original page 13Page 15 · Read text
2) Clean the film channel and pressure-
plate occasionally with a piece of lint-free
cloth.
3) Never oil the mechanism. The shutter
will work for many tens of thousands of
exposures without lubrication.
4) Never try to dismantle the ALPA your-
self. This requires not only expert know-
ledge but also specialtools. Your guarantee
becbmes void if the ALPA is serviced by
any unauthorized Person.
5) lf you are so unlucky as to drop the
camera into the sea, it must be thoroughly
rinsed in several changes of fresh water
before being dried. lt must then be sent
without delay to an authorized dealer or
to the factory.
6) lf your camera is lost or sto len advise the
fdctory at once of the serial numbers of
body and lens. We strongly recommend that
you insure your ALPA equipment.
7) When inserting a film, either a new one
or one reloaded by yourself, check that
the lips of the cassette are not too tight, and
that the film comes out easily.
It is a good idea also to check that there are
no loose velvet threads hanging from the
cassette; these can easily become trapped
in the film window and make shadows on
all your pictures.
12View original page 15Page 16 · Read text
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SWITZERLANID
PIGNONS S.A. CH -1338 Ballaigues
Printed in Switzerland 5/01 51 /516.731G8 HaefeliView original page 16Page 17 · Read text
ALPA 11 si Mode d'emploi ab1696 Ku rzgebra uchsa n I eitu ng Brief instructions for use Brevi istruzioni per I'uso Breves instruccionas para el usoView original page 17
Page 18 · Read text
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FRAN9Af S DEUTSCH
A l'exception du systdme 6lec- Mit Ausnahme des elektronischen
tronique de la mesure de l'exposi- Belichtungsmess-Systems ist die
tion, l'ALPA 11 si est en tous points ALPA 11 si in allen Punkten mit der
semblable au moddle 11 el. Son ma- 11 el identisch. Die Handhabunq ist
niement est donc identique, m6me dieselbe, selbst was die Beiich-
en ce qui concerne ? mesure de l'ex- tungsmessung betrifft. Der augen-
position. La diff6ren( ? apparente 16- scheinliche Unterschied besteht in
3side dans le fait qu.. le 11 si est der Tatsache, dass die 11 si mit Leuchtdiod.gn versehen ist: die gelbepourvu de lumineuses: la 3 diodes grune bedeutet Uberlichtung, diejaune qui signifie surexposition, la zeigt die korrekte Belichtung an, undverte qui signifie exposition correcte die rote die Unterbelichtung.et la rouge qui signifie sous- Der wirkliche Unterschied-ist daher
exposition. im innern verborgen. Die ALPA 11 si
ist mit einem elektronischen SystemLa diff6rence r6elle est donc interne. versehen, das aus 2 Silizium-ZellenL'ALPA 11 si est 6quip6 d'un systdme fur die Belichtunqsmessunq und aus6lectronique comportant 2 cellules einer CdS Zelle lum Ausqleich des
au silicium pour la mesure de l'expo- Einfalles von Fremdlicht 6urch dassition et une cellule CdS pour la Okular besteht. Der Mess-Spielraum
compensation de la lumidre parasite der durch Silizium-Zellen wahroe-
pouvant entrer par l'oculaire. La nommen wird, reicht von O.O1 bis
gamme d'6clairement percue par les 10OOO0 Lux.
cellules si s'6tend de O.O1 a 1OOOO0 Dies bedeutet, dass alle Verschluss-
lux. geschwindigkeiten wirklich mit allen
Filmempfindlichkeiten gekuppelt
Ce qui signifie que toutes les vites- sind. In weniger technischer Spra-
ses sont r6ellement coupl6es d tou- che bedeutet dies, dass es nunmehrtes les sensibilit6s. En clair, il est moglich geworden ist, in einer Reihe
maintenant possible de mesurer en wie folgt zu messen: von 1/1000
continu du 1/1OOO S avec une sensi- Sek. bei einer Filmempfindlichkeit
bilit6 de 3 ASA d 1 S avec un film de von 3 ASA bis zu einer Sekunde mit
6400 ASA ! einer Filmempfindlichkeit von 6400 ASA (DIN 39).
De plus, les cellules si ne pr6sentent Zusiitzlich weisen die Siliziumzellen
plus l'inconv6nient du temps de 16- den Nachteil des verspdtet in Aktion
ponse (accoutumance progressive d tretens (progressives Gewohnen an
de faibles niveaux d'6clairage) ni de schwache LichtverhSltnisse und des
m6moire (6blouissement aprds un Geddchtnis-Effektes : geschockt
6clairage intense). La mesure est sein nach Aufnahme eines starken
instantan6e quel que soit le niveau Lichtstrahles) nicht mehr auf. Die
de l'6clairement. Messung erfolgt augenblicklich wie immer die Beleuchtungsverhaltnisse
La compensation op6r6e par la 3e auch seien.
cellule a 6t6 elle aussi am6lio16e oar Der Umfang der Ausgleichsmoglich-
la sensibilit6 du systdme, d tel point keiten der dritten Zelle wurde durch
qu'elle peut m6me atteindre plus de die vergrosserte Sensibilitat des Sy-
lOOo/o dans certains cas oir l'6clai- stems ebenfalls verbessert, je so-rage parasite est plus intense que weit perfektioniert, dass sie soqar mehr als lOOo/o erreichen kann, dTescelui atteignant l'objectif. in gewissen Fdllen, wenn das Streu-
licht intensiver ist, als das Haupt-
licht, dass das Objektiv erreicht.View original page 18Page 19 · Read text
I
ENGLISH ITALIANO
Except for the electronic system of Ad eccezione del sistema elettronico
exposure measurement, the ALPA di misurazione dell'esposizione,
11 si is in every aspect similar to I'ALPA 11 si d simile in ogni punto al
model 11 el. lts handling is therefore modello 11 el. llsuo maneggiamento
identical, even where the exposure C dunque identico, perfino in quel
measurement is concerned. The ap- che concerne la misurazione dell'e-
parent difference resides in the fact sposizione. La differenza apparente
that the 11 si has 3 light-omitting risiede nel fatto che il 11 si d munito
diodes: yellow one denoting overex- di 3 diodi luminosi: il giallo significa
posure, green one the correct ex- sovra-esposizione, il verde significa
posure and the red denoting under- esposizione giusta ed il rosso signifi-
exposu re. ca sotto-esposizione.
The real difference is thus internal. La differenza reale d dunque all'in-
ALPA 11 si has an electronic system terno. L'ALPA 11 sid munito di un si-
with 2 silicium cells for measuring stema elettronico che comprende
exposure, and a CdS cell for com- 2 cellule al silicio per la misura del-
pensating parasitic light which l'esposizione ed una cellula al CdS
might enter through the view finder, per la compensazione della luce pa-
The range of light levels detected by rasita che potrebbe entrare attraver-
the si cells covers a range fr:om O,O1 so l'oculare. La gamma d'illumina-
and 100OOO lux. zione percepita dalle cellule al silicio
This means that all the speeds are siestende da 0.01 a lOOOOO lux.
definitely coupled with all the sen- Cid significa che tutte le velocitd
sibilities. In fact it ist now possible to sono accoppiate a tutte le sensibi-
measure continuously from 1/1000 litd. In chiaro, adesso d possibile ef-
sec with a sentivity of 3 ASA to 1 sec fettuare una misurazione continua
with a film of 6400 ASA ! dal 1/1OOO sec. con una sensibilita di
3 ASA a 1 sec con una pellicola diMoreover, the si cells no longer pre- 6400 ASA !sent the inconvenience of response
time (progressive sensitization to Inoltre, le cellule al si non presenta-
weak lighting level) nor of memory no pi0 l'inconveniente del tempo di
(saturation after intense lighting). responso (adattazione progressiva a
Measure is instantaneous whatever livelli deboli d'illuminazione) ni quel-
the level of lighting. lo della memoria (acecamento dopo
The compensation brought about by un illuminazione intensa). La misura-
the 3rd cell has also been improved zione d instantanea a qualsiasi livello
upon by the sensitivity of the system d'illu minazione.
to such an extent that it can reach La compensazione effettuata dalla
more than lOOo/o, in the event that 3a cellula d stata anch'essa amelio-
parasitic lighting is more intense rata a mezzo della sensibilitd del si-
than the light reaching the objective. stema a tal punto che essa pud rag-
giungere il lOOo/o in certi casi dove
l'illuminazione parasita d pii intensa
di quella che raggiunge l'obiettivo.View original page 19Page 20 · Read text
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ESPAwOI-
Excepto el sistema electr6nico para
la medida de exposici6n, el ALPA
11 si es absolutamente semejante al
modelo 11 el. Su manejo queda pu6s
el mismo, tambi6n para la medida de
la exposici6n. La difer6ncia aparente Aq reside en le hecho de que el ALPA
11 si posee 3 indicadores luminosos:
amarillo significa sobreexposici6n,
verde exposici6n correcta, rojo ex-
posici6n i nsuficiente.
La diferencia real es solamente in-
terna. El modelo ALPA 11 si posee un
sistema electr6nico con 2 c6lulas al lmage du viseur, avec le d6poli et
silicio para la medida de la exposi- les 3 signaux lumineux (LEDS).
ci6n y una c6lula CdS para la com-
pensaci6n de la luz par5sita podien-
do entrar por el ocular. La intensidad Ansicht des Suchers mit Matt-
de la luz medida por las c6lulas se scheibe und den Belichtungssignal
extiende de O.O1 a lOOOOO lux. Esta (LEDS).
ventaja permite el uso de todas las
velocidades para todas las sensibili-
dades. Es decir que ahora se puede Viewer image, with groundglass and
medir en continuo 1/1OOO seg. con the 3 signals (LEDS).
una sensibilidad de 3 ASA y hasta 1
seg. una sensibilidad de 64O0 ASA !
ll visore col vetro smerigliato ed iAdem6s, las c6lulas si pueden dar 3 segnali luminosi (LEDS).una medida instantdnea para cual-
quier intensidad de luz sin presentar
las desventajas conocidas del tiem- lmagen del visor con cristal esme-po de repuesta (par luz floja) y de rillado y los 3 indicadores luminososmemoria (deslumbramiento des- (LEDS).
pu6s de una iluminaci6n intensa).
ta compensaci6n lograda con la ter-
cera c6lula ha estado tambi6n mejo-
rada. La sensibilidad del sistema ac-
tual permite una compensacion de
mds de lOOo/o en ciertos casos de luz
par6sita mds intensa que la que llega
alobjetivo.
f mprim6 en Suisse 5/218/1/8.76
Gedruckt in der Schweiz 5/218/1/8.76
Printed in Switzerland 5/218/1/8.7 6
Stampato in Svizzera 5/218/1/8.7 6
Estamoado en Suiza 5/218/18.7 6View original page 20Related documents and language editions
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