Movie cameras & projectors
Gun Site Aming Point 16mm cameras User manual
User manual for Gun Site Aming Point 16mm cameras. 16 pages in English. Read the original PDF, download or print a copy without registration.
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Document details
- Brand
- Gun
- Model / document
- Gun Site Aming Point 16mm cameras
- Document type
- User manual
- Language
- English
- Pages
- 16
- File size
- 3.0 MB
- Category
- Movie cameras & projectors
- Document date
- Not specified in catalog
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Page 3 · Read text
Instructions for Operating
U. S. Arrny Air Force
Gun Sight Airning Point l6rnrn. Carneras
(GSAP) Types M-1' N'I-20 N-1, and N-2
The camera types differ onlY in lens LOADING THE CAMERA
. equipment and in voltage, as follorvs: The GSAP Camera uses film which
Voltage oJ Motor is pre-threaded in metal magazines. To
Cemera and load the camera, lift the spring latch A, TlPt Oaer-Run Control Lens Figure 1, and open the door. Insert the M-l '|,2-volt 3-in., Plain film magazine B, Figure 1, as illus- M-2 'l2-volt 3-in.,. 90' trated, making certain that (1) the erectlng system
N-l 24-volt 3-in., Plain opening in the film magazine goes in
N-2 24-volt 3-in., 90o first; (2) the pin on the edge of the
erectlng system magazine faces away from the cable
POWER t receptacle;the rnagazineand,(which(3) theis notfootageuseddialin thison
The Bell & Howell GSAP Camera is camera) is toward the outer face of the driven by an electric motor. A thermo- camera and not toward the interior. stat automatically cuts out the motor it Push the magazine forward until there improper threading of the film maga-
zine, or any other factor, should cause is an audible click; then close the door.
the film to jam, thus eliminating fire
hazard, burnt-out motor, etc. A SPEED CONTROL
de scription of power connections
and a wiring diagram for camera and This camera operates at any one of
over-run control appear on page 11' 3 speeds 16, 32, or 64 frames (or -
www.butkus.usView original page 3Page 5 · Read text
indicator knob E, Figure 2, until the THE LENS footage dial F, just below, indicates 0,
G, if a full rnagazine is to be used. If the Method of Mounting. The Lens
film magazine is not full, set the indi- Figure 2, is permanently mounted with-
sheath-and- caror ro correspond with the figure on in the heavy, protective,
lens is the rnagazine footage-indicator dial. flange unit H, Figure 2. The
Henceforth during that film run, the mounted on the camera by fitting the
dial will indicate the amount of film flange over the three dowel studs J,
stil I remaining unexp ose d. Figure 2. When changing lenses, use
,.r
Fieure 2
C. Speed control knob G. Lens
D. Speed index rnarh H. Lens sheath
E. Footage indicator knob J. Lens rnounting studs
F. Footage dial K. Lens heater pin jacks
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the wrench A, Figure 7, and be sure
that the flange is flush with the camera
housing before tightening the nuts on
the dowel studs.
Adjusting the lens. Both types of
lenses are 3 inches in focal length, and
although they are not calibrated in
f/-values, the maximum aperture is
t/4.5. Each type is adjusted in the
same manner. Two lens adjustments
are necessary, one for the camera
speed-1 6, 32, or 64 frames per second
one for the light conditions-- 3-and FigureB (bright), H (hazy), and D (dull).
These adjustments are effected with Detail of lens adjustrnent. Lens (with 90o erecting systern) is set forthe three lens collars P, Q, and R, carnera speed of 15, under brightFigure 3. Collar P is fixed, and bears a lighting conditions
single index mark 0, Figure 3. Collar Q L. Diaphragrn index rnarhrotates, and bears the exposure sym- M. Exposure syrnbols for lightingbols B, H, and D, on its forward edge conditions
M, Figure 3, and the camera speed N. Carnera speed figures
figures 76, 32, and 64, on its rear edge O. Fixed index rnarh
N, Figure 3. Collar R is the diaphragm P. Fixed index collar
adjustment. It also rotates, bearing the Q. Rotating speed and light collar
single index mark L, Figure 3. R. Rotating diaphragrn collar
S. 90'erecting systern To set the lens, rotate collar Q until
the index mark for the desired camera
speed N, Figure 3, is opposite the fixed moment. The lens shown in Figure 3
index mark O, Figure 3. Then rotate is set for work at 76 frames per second
collar R, until the diaphragm index on a bright duy. Figure 4 shows the
mark L, Figure 3, is opposite the sym- plain lens set for operation at 64 speed
bol for the light conditions of the on a dull dav.
.4.View original page 6Page 7 · Read text
Figure 5
Lens with 90o erecting systern
S. 90'erecting sYstern
T. Lens
i. S"*"*so which.are rernoved when erecting sYstern is to be shifted Figure 4 W-. Filter
Plain lens set for work at 64 frarnes
per second on a dull daY
the lens by 90'. For examPle, with
lens pointed vertically upward, the No additional lens adjustment need photographic aim is on a horizontalbe made for the filter, since its factor plane.is compensated for in the lens calibra- The erector is affixed to the outer
tions. flange of the lens sheath by 3 screws V,
anYThe Lens with 90" Erecting Systern' Figures 5 and 6, which will fit in
The lens on TYPes l|d-z and N-2 of? threaded holes X, Figure 6, which
Cameras is equipped with a 90" erect- are tapped at quadrants about the cir- of the lens flange' Thus, ing system S, Figures 3 and 5, which cumfeience
deflects the photographic airn of the when the screws are removed, as in
.5.
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Interchangeability. Both types of ing when the temperature drops below
lenses are interchangeable on all 35' F. and is cut out if the internal
4 types of cameras. Also, erecting temperature rises to 95' F.
system, sunshade, and filter are inter- If an external, lens-heating unit isfi
changeable and will fit both lenses to be used, to prevent the glass surfaces
treme cold. the heater cord should bet IMPORTANT:described herein. Neaer attempt to dis- from becoming frost-covered in ex-
assemble the lens or the erecting s)tstem. plugged into the pin-jacks K, Figure 2,
I which are provided for this purpose.
. THE FILTER
FIDUCIAL MARKS Each lens is equipped with an amber
filter having light transmission char- While no reticle pattern has been in-
acteristics equivalent to a Wratten No. corporated in the optical system of the
1,2 (minus blue) filter. The filter camera, the photographic aperture has
should be left in position at all times, been provided with two pairs of fiducial
except for cleaning, for two reasons: marks which will be visible in each
(1) lens adjustments are calibrated to frame of exposed film. One pair of
compensate for the increased exposure these marks is located on the horizon-
required when a filter is used, and (2) tal plane on the center line of the frame,
the filter rvill prevent dust and dirt X and the other pair is on the exact
from reaching the optical surfaces in vertical center line of the frame.
lens and erecting system. It will be observed that the crosslines
of the aligning indicator align them-
t I{EATING UNITS selvesaperture.with the fiducial marks in the To prevent freezing at high altitudes,
the camera is equipped with a thermo- I static heater, which, down to a mini- ATIGNING INDICATOR
mum of 40' F. below zero. automati- The aligning indicator, Figure 8, for
cally maintains the interior of the the GSAP Camera is designed to fit
camera at a temperature between 35o into the chamber ordinarily occupied
F. and 95 " F. The heater starts operat- by the film magazine. Insert the indi-
www.butkus.usView original page 9Page 10 · Read text
Figure B
Aligning indicator
C. EyePiece
cator as shown in Figure 9, the rounded
end going in first, and the flat, solid side
of the indicator facing the outside of the
camera (the door-hinge side). Push the
indlcator in as far as it will go.
'Ihe eyepiece C, Figure B, of the
optical system will rotate through
360", and may be used in any position.
The eyepiece may be detached from the
indicator simply by pulling it out, and
care should be taken that when it is
replaced, the tube is pushed into the
indicator up to the hilt, in order to
engage the spring button (within the
indicator) with the groove on the tube. Figure 9 The cross lines of the aligning indica- Inserting aligning indicatortor are adjusted in manufacture to
correspond with the fiducial marks of camera fiducial marks, the camera
the photographic aper'ture. If the should be turned in to an overhaul
cross lines do not coincide with the activity for checking and adjustment.View original page 10Page 11 · Read text
Flowever, an external over-run con-
trol has been provided which may be
adjusted by the turn of a knob to keep
the camera r_unning for up to three
seconds after firing ceases. When the
h, over-run control is used, the film ex-
posed during the over-run rnay be
identified, from that exposed during
r|/ firing, by the image of a retractile
pointer which automatically moves into
the aperture area from the upper left
hand corner (as the film is projected),
when firing ceases and the over-run
begins. This indicator will be visible in
each frame exposed during the overrun.
The over-run control, Figure 10, is
Figure 10 calibrated from 0 to 3 seconds, in in-
Over-rrn control set at 2l/4 seconds tervals of 1/4 second, and the time
be D. Tirne-corrtrol knob control knob D, Figure 10, trray
E. Control'cr.t-out switch turned in either direction to point to F. Receptacle for carnera cable any desired time figure. As shown in G. Receptacle for line cable Figure 10, the over-run control is set
to keep the camera operating for 21/a
1 OYER.RUN CONTROL seconds after pressure has been released
from the gun switch.
lt The Bell & Howell GSAP Camera is If the over-run control is not to be designed to start operating simultanq-
ously with the weapon, and, unless a used, it may be cut out by throwing
special, external control is used, the the control cut-out switch E, Figure
camera will stop when firing ceases. 10, to the "off" position.
.9.
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Filrn Exposed by Over-Run Control, in
Terrns of Frarnes and Feet
SECOATDSView original page 12Page 14 · Read text
CARRYING CASE each unit, so that movement n'ithin the case is reduced to a minimum. Each
as The specially built carrying case unit should be packed in the case
provides compartments designed to fit shown in Figure 12.
ffi
Figure 12
Carrying case, with various units properly fitted into their cornpartrnents
H. Carnera N. Aligning indicator
cap J. Extra itlentification cards O. I)ust I(. Instruction booh P. Filter'W.rench L. Over-rrn control Q. M. Filrn rnagazine R. Bxtra lenses
L2.View original page 14Page 15 · Read text
T
CAMERA MAINTENANCE disassembly of lens or erecting system
should be attempted. The filter and Lubrication. The carnera is com- 'lubricated the outer lens surface should be cleaned pletely when it leaves the with a soft brush or with special lens- factory, and no further lubrication cleaning tissue. The exposed surface of any part is necessary. Lubrication o[ the filter should be watched, to be will be checked and renewed rvhen ' sure that no finger marks or dust re- necessary, when the camera is over- mains there. Even though the lens is hauled. clean, it cannot do good work if there
Cleaning. Cleanliness is an important is a dirty filter in front of it.
factor in the successful operation Alrvays keep the dust cap B, Figure
of any motion picture camera. While 7 , fastenecl tightly over the lens seat
the lens, erecting system, sunshade, on the carnera when no lens is in
and filter are removable. no further place.
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i l www.butkus.us13View original page 15From the M. Butkus archive. Original publisher and archive notices are retained.
Check the model and edition against your equipment.
PDF verified 2026-10-10.