gossen sixtar lichtmeter
The 1966 Gossen Sixtar (in US Super Pilot) exposure meter was a derivative of the Lunasix, apparently aimed at the advanced amateur. The Sixtar has a display with match needle instead of luminance scale, making it easier to use.
The Sixtar measures continuously, there is no power switch. The match needle is aligned over the reading needle and then corresponding aperture and shutter speeds read from the scale.
For low light, the button is depressed to activate a reduced scale. In extreme low light, this button can be depressed further to lock the reading needle.
Setting the film speed
Measures the reflected light
Measurement of the incident light
The drag needle (9) SIXTAR is mechanically coupled to the computer.
The batteries used are of the PX 13 MALLORY whose life depends on the current consumption. Maximum life of about one year is possible if care is taken not to open the case of the all-ready light meter that during measurement operations.
The zero adjustment of the needle is performed by removing the batteries. The needle should then be on the left edge of the red zone. If it is not so, returning the meter needle to the correct zero position by turning the zero adjustment screw located in the lower part of the device.
|lux measurement of the incident light 18 ° DIN||0.7||1.4||2.8|
|asb (measurement of the reflected light)||0.095||0.19||0.38|
The old exposure time '2,' 4 '8 ... represent fractions of a second, that is to say, 1/2, 1/4, 1/8 sec. etc. ...dropoff Window
The SIXTAR measures light understood as a nail, which is returned by the object to be photographed.
The indication raised does not only depend on the light intensity but also the colors and reflective objects.
The lighting remaining the same, the needle will deflect more strongly if the meter is directed onto light objects and more weakly in the case of dark objects. The meter totals the partial clear details and responds to an average value.
In some cases contrasts clarity or particularly strong color, it is preferable to perform the measurement on the part of the most interesting object of exposure viewpoint. Black and white, it is usually in the dark part that we would like to distinguish certain details; in color photos, for cons, it is usually clear parts in which we want to see a good modeling. It is therefore necessary to approach some of the object to be photographed, but avoid your shadow or that of SIXTAR is not projected on the object. This method is known under the name of "close measurement" (Nahmessung).
The angle measurement SIXTAR, limited to 30 °, is one of the particular advantages of this meter. It allows highly accurate and effective action. The opportunity to contrast the different subjects or objects to be photographed up the SIXTAR at the forefront of exposure meters.
The needle of the mobile unit indicates the distribution, uniform or not, the brightness of the object.
In the measurements carried out from the object towards the camera, the SIXTAR fully enters the light incident on the portion of the object facing the camera, without taking account of the reflectivity or color of the object.
When photographing is hardly visible details, conduct the measurement of the incident light into an equivalent point, that is to say, benefiting from the same illumination. To measure, do not direct the SIXTAR directly on the camera, but in parallel to a line connecting the object to the camera. This method of measurement of the incident light into an equivalent point must often be used as, for example, for taking open air photos. Therefore, if you have the same illumination at the location of the subject, as that of the device, simply turn around and take the measurement with your back to the photographed object.
Photos obtained under low illumination require long exposure times (requiring the use of a foot). This fact leads in films from all sources, the effect Schwarzschild said: times measured for the shot must be extended to prevent underexposure.
Various qualities of films, that exhibit a more or less pronounced effect. This is why it is not considered on the scale of SIXTAR. For all color film, the Schwarzschild effect can further cause shades offsets (colors rendered falsely) that require compensation by special filters.
Some types of plans are accompanied by film features and instructions on shooting time prolonged pose. In other cases we recommend to go to a specialized laboratory color work or film manufacturer.
The SIXTAR is a very sophisticated device, built and calibrated precisely. The photo-resistant new type of an element which is provided with this unit allows exceptional performance. So it should not be unnecessarily exposed to light, if you want it permanently ensures a proper job. Limit the duration of measures towards the sun, the strictly necessary.
When not in use, leave your SIXTAR rest in its case to protect from light. Indeed, photo-resistant element is not subjected to actual change in its properties, when it is subjected to the action of light, but has a sort of prior illumination memory. Greater measurement accuracy will be obtained when the previous illumination has been nil.
You can control yourself the proper functioning of SIXTAR by checking the battery and setting the zero.
Additional tests, for example, comparative measurements with a meter of the same or a different kind, are not feasible with sufficient accuracy without special devices (optical bench).
In the event that your SIXTAR fails, do not try to repair it yourself. Return it immediately to your photographer.