User manual BOLEX 18-5

[. . . ] Framing the subject Focusing Fixed focus setting Depth of field Automatic exposure system. Modification of the time of reaction of the diaphragm Manual correction of the aperture Locking the diaphragm Fade-ins and fade-outs Filming in daylight and artificial light. Synchro-flash/synchro-sound socket Macro shots . Care of camera Accessories available on request . [. . . ] If one half of the split image field appears unsharp or darker, move the camera slightly sideways or up and down in front of the eye until both halves of the field appear equally bright. Fixed focus setting When focused, the lens can be set at any focal length and the image will stay in focus (as long as the actual subject distance remains constant). For instant readiness the focusi~g ring can be set to the markczz between 10 and 13 feet and the zoom knob to 12. This combination provides a sharp image from about 6';' feet to infinity, even in relatively poor light. 10 Depth of field The depth of field is the zone of sharp focus and depends on the focal length, the lens aperture and the focusing distance. Depth of field is shallow when lens is set at: . By pressing the red locking button, the switch' can be moved to "+ 1" or "-1 ", or to intermediate positions corresponding to "+ '12" or "- '12". At the + 1 setting the diaphragm is opened by one stop which is useful for backlighted shots, portraits against large bright areas. At the - 1 setting the diaphragm is Closed down by one stop to reduce exposure (for shots from a dark doorway, for instance). 12 The diaphragm locking system The diaphragm locking system permits setting the aperture to provide correct exposure for a certain subject area within a scene. This is helpful in scenes with great contrast - a person in front of a bright background, a spotlighted performer on a dark stage, for instance. Important: Return the aperture correction to its center position. button If the meter is used normally and automatically in such cases, the dark or bright background area influences the diaphragm setting, thereby underor overexposing the main subject. The diaphragm locking system can be used to overcome exposure problems in such cases. We recommend you to make a few test runs before filming an important sequence with electronic flash for the first time. Synchro-sound filming '1/ ! I I I r 8 . --. . . . . . . 10 12 14 18 mount the camera on a steady support (tripod); determine the correct aperture based on the electronic flash unit and its distance from the subject by means . of the following formula: diaphragm = guide number distance in feet Example: guide number 80 distance 10ft. The contact used for the synchronization of an electronic flash gives off one impulse per frame and can also be used for connecting a tape-recorder for synchro-sound recording. Your photographic dealer will gladly give you information concerning the different possibilities. I 7\ macro < 25 1, 5~)' / / ~ ~ = f/8 10 Lock the diaphragm at the aperture determined by the formula. N. B. : since the optical system in Super 8 cameras has a greater light loss than in still cameras, it is recommended to use a film sensitivity half the rated speed (ASA 20 instead of 40) when determining the guide number. After pressing the macro button, the zoom knob can be turned either by hand or with the power zoom motor into the macro range, thereby extending the focusing range from infinity down to where the lens touches the subject, covering an area approximately an inch in size. When the zoom knob is in the Macro zone, the lens is set to wide-angle position, which ensures greater depth of field and good picture steadiness even if you film holding the camera in your hand. 16 Care of camera Width of area covered (inches) Distance, subject to front of lens (inches) In the Macro position, the coincidence rangefinder is also used for focusing. The actual setting is done by means of the zoom knob, and must be done accurately because of the shallow depth of field (see last-but-one page of the Instructions). Chart above shows area coverage at diferent distances with the focus setting at infinity and zoom knob in macro range. When turning the zoom knob out of the macro range, the macro button jumps out and prevents accidental turning of the knob back into the macro range. 6" 4" 4" 2'/, " 2-'/'" 1-'/'" 1-'/'" 6'/'" Special effects and transitions The Bolex Macrozoom® lens allows you to make special effects, heightening the interest of you r film: you will be able, for example, to film slides or titles that you wish to include in your film (see "Bolex Macro Set" under "Accessories available separately", page 18); you will also be able to create smooth and pleasing transitions from one scene to the next. By zooming from a long shot into the macro range, a pleasinq and effective focus transition from a distant to a close subject is obtained. [. . . ] Perfect camera steadiness and unchanging framing are absolutely necessary. Take four to five pictures of the doll in a given attitude, then slightly alter the position of the arms, legs and head, according to the movements you want it to perform, and then take another four or five shots; change the position of the doll again, film, and so on. On the screen, the doll's movements will appear more or less jerky, depending on the number of shots taken in each position and the varying degree of difference between the successive positions of the subject. Following the same principle, you can for example liven up an itinerary on a map by means of little silhouettes of vehicles, make titles whose letters jump into place all on their own, etc. [. . . ]