Als er een antwoord wordt gegeven op uw vraag, dan is het voor de gever van het antwoord nuttig om te weten als u er wel of niet mee geholpen bent! Wij vragen u dus ook te reageren op een antwoord. Antwoorden worden ook per e-mail naar abonnees gestuurd. Laat uw emailadres achter op deze site, zodat u op de hoogte blijft.
|Published (Last):||8 March 2014|
|PDF File Size:||4.1 Mb|
|ePub File Size:||17.12 Mb|
|Price:||Free* [*Free Regsitration Required]|
It enables you, by means of instant-lock-on attachments, to refine your measuring techniques not only in your camera work on location and in the studio, but in enlarging or in photomicrography and photography through terrestrial telescopes. Basic Operating Instructions Setting the film speed Look up the DIN or ASA Exposure Index of the film in use you will find it on the film box or film instruction sheet and turn the plexiglass film-speed setting disc 17 by the raised bars, until the DIN or ASA Index number is lined up against the triangular white marker in the respective window.
Reflected Light Measurement: Move the converter slide 10 all the way to the right; this uncovers the round window. Incident Light Measurement: Move the converter slide 10 so that the spherical diffuser is centered over the round window. Light Measurement - basic steps Press the range selector 15 backward and release it when the indicator needle 14 stops moving. This locks the reading in for convenient reference. If the indicator needle is deflected only slightly below 12 on the scale , take a new reading by pressing the range selector forward.
Wait again until the needle stops, and lock the reading in by releasing the selector. If the light is so poor that you cannot observe the movement of the needle, simply hold down the selector for several seconds. After releasing it, you have locked in the correct reading and can take the LUNASIX 3 to better light, or use a flashlight to read the scale.
As you press the selector forward, the values 1 to 12 appear in the upper frame, and the upper scale divisions apply, when you press the selector backward, the values 12 to 22 appear in the lower frame to which the adjacent lower scale divisions apply.
When you release the selector, only the scale values applicable to the measuring range which you just selected, remain visible. After taking the measurement, turn the computer ring 5 until the obtained reading is set at the triangular yellow index 9 of the transfer scale 6. The green and red ring indexes apply only for measurements with the Variable Angle "spot meter" attachment.
See page The LUNASIX 3 now gives you complete exposure information in combinations off-stops and exposure times 2 and 1 , EV settings 18 or frames per second for motion picture cameras 3. You will find additional information about all scale values on page The resultant reading, therefore, depends not only on the intensity of the illumination, but also on the colour and brightness of the objects themselves.
Thus, under identical illumination, the indicator needle will be deflected less by dark objects than by bright ones. If the scene contains strong contrasts in brightness or colour, it is preferable to measure that part of the scene which requires the most accurate exposure.
For black-and-white or colour negative films, this is usually a darker area which is to show details in the final print; for reversal colour slide or movie films, however, the lighter areas are usually favoured. To measure the important areas, get closer to the subject but not so close that your own shadow or that of the LUNASIX 3 falls on the subject.
This method is called: close-up reading. In incident light measurement - from the subject towards the camera - the LUNASIX 3 measures all the light falling on that part of the subject which faces the camera.
Naturally, neither the colour nor the brightness of the subject itself is considered by this measurement. With inaccessible subjects, take the incident light measurement at a substitute spot which receives the same illumination as the subject. However, instead of pointing the LUNASIX 3 towards the camera, you point it parallel to an imaginary line from the object to the camera.
Incident light measurement at a substitute spot of equal illumination is also convenient for many regular outdoor scenes. Frequently, the spot where you stand with the camera receives the same illumination as the scene which you intend to photograph, in which case you merely do "about face" with your LUNASIX 3 and measure the light exactly opposite to the direction of the camera.
More about this on page It is advisable to check the condition of the batteries from time to time, as follows: Push the ridged slide 22 in the direction of the arrow without pressing the range selector During the battery test, the indicator needle 14 should point to the red check mark Otherwise, fresh batteries must be used. To replace the batteries, unscrew the cover of the battery chamber 21 - a coin will be useful for this.
After inserting fresh batteries, immediately make the battery test described above. Mallory PX 13 mercury batteries are available at most camera shops. Then press the range selector 12 forward or backward. The indicator needle should now rest on the check line to the left of the scale divisions To adjust the indicator needle to the zero check line, turn the zero adjustment screw 24 on the underside of the LUNASIX 3, while holding down the range selector Even the most advanced "electronic brain" is helpless without the scientist who phrases his problems so that they can be processed by the computer.
This world is made up of many parts, which differ considerably in size, colour and brightness. In the case of reflected light measurement, the LUNASIX 3 collects, within a certain angle, the light which is reflected from these many individual parts of the scene; it adds up all the light and strikes an average for which it indicates a suitable exposure time.
And, normally, the exposure indicated in this manner is perfectly correct. Reflected Light Measurement, see also pages 3 and 5. Anything unusual which you - as attentive! If the scene includes a large very bright area - far from the "average" that the LUNASIX 3 would normally calculate with - it will indicate a shorter exposure time than it would for a large very dark area.
But you want to see the very light, or very dark area in the finished picture again as "very light" or "very dark" - not as "grey"! What to do? Whatever lies outside of these variously shaped areas remains unseen! The small measuring areas permit very accurate, carefully aimed measurements for exposures with longer lenses, and selective readings of various parts of a scene or subject when normal lenses are used.
Incident Light Measurement see also pages 3 and 5 In this measuring method, your LUNASIX 3 "sees" only the light falling on that part of the scene which is facing the camera - in other words: the part which will be photographed. The result of this measurement does not consider the colour or brightness of the scene itself. Thus, incident light measurement is ideal for the previous example with extensive very bright or very dark areas - it will give you perfect results.
But, when is a scene "perfectly" exposed? For the amateur, especially the beginner, the over-all impression is usually decisive. But soon the demands become more stringent, especially when results are compared. For colour slide or movie film - which as you know, requires more critical exposure - the lighter portions of a scene usually determine the exposure. Therefore, keep an eye on such lighter areas and preferably expose a little shorter rather than longer, to get more brilliant colours.
For black-and-white or colour negative film, however, the shadow portions which are to have some detail in the finished print must be given consideration. Therefore, watch the darker areas and expose a little longer rather than too little. Most important: Be critical of your results! Analyze your prints and color transparencies for possible mistakes or errors in judgment. Learn from your experience: Failures properly analyzed will soon lead to consistent successes!
Remember, that, when there are extreme contrasts in a scene, the film may not be able to cope with them! About "exposure steps" see page Here is how: The Personal Touch Do you really have to expose very critically every time? There are two answers to this question: 1 On black-and-white or colour negative film you will get good negatives almost without exception and without fuss.
Deviations from correct exposure will produce transparencies that are either too light or too dark; you may also get distortion of colours. Now, you must remember that the accurate exposure information which your LUNASIX 3 gives you may not even be fully utilized because all sorts of "tolerances" must be reckoned with: a The actual sensitivity of a film may differ from the one indicated on the film package.
If you make several exposures of the same scene or subject with various exposure times, you will almost never get complete agreement among different judges as to which negative or which slide received "perfect" exposure!
However, you can adapt your LUNASIX 3 exposure readings to the characteristics of your camera, your favorite film, your type of processing, your projector - in other words to your personal touch. Use a reversal colour film; select several "normal" scenes; take careful reflected and incident light measurements and shoot! But - each time make a series of 5 exposures; in addition to the one at the indicated exposure time, make one each at a full step and one-half step more and less than indicated by your LUNASIX 3.
Make complete notes of the readings and of any special conditions. When you have your finished transparencies, select the ones which, in your judgment, are "perfect" and compare them with your notes concerning exposure measurements, etc. Otherwise, determine by how much you need to increase or decrease future exposure readings to get the best results. With this adjustment you have then gained your "Personal Touch".
Gossen MetraWatt lunasix Operating Instructions Manual
Lunasix 3 manual