Страница 1: ... GOSSEN Luna Pro sbc Instruction Manual 7909 1057YO ...
Страница 2: ... If it does not feel free to contact your specialist dealer In addition our Con sumer Service Department is available for help with special requests 2 Congratulations You now own one of the most advanced ex posure meter the heart of the Luna Pro sbc System The new Luna Pro sbc System is the most flexible versatile and adaptable photographic light measur ing system ever devised while at the same ti...
Страница 3: ...f Measurement 14 Il g Incident Measurement 17 II h Reflected Measurement 18 II i Scene Brightness Range 19 lI j Color Crossover 21 Il k Zone Systems 21 11 1 Film Reciprocity Failure Il m Intermediate f stops Il n Intermediate Footcandle Values and Exposure Time Section III Helpful Hints Ill a Choosing Between Action Stopping Ability and Depth of Field IIl b Snow Sand IIl c Sunsets Ill d Night Ligh...
Страница 4: ...d Scale 10 Exposure Correction Dial 13 11 Computer Dial 14 12 Battery Test Zone 15 22 13 Exposure Correction Signal 14 Exposure Time Scale 15 Aperture Scale 16 16 Film Speed Setting Disk 17 17 Exposure Value Scale 18 18 Exposure Factor Scale 19 Index Mark 23 19 Zone System Scale 20 Measuring Cell Window under diffuser 21 Zero Adjusting Screw 22 Table of Footcandle and Lux Values 23 Battery Compart...
Страница 5: ...the zero mark ca Lux mit Diffuso bei 18 DIN e Ie appro I b Inserting Changing the Battery Your Luna Pro sbc is supplied with a 9 volt battery which fits into the battery compartment at the bot tom of the meter Slide the battery compartment lid 23 off and attach the battery to the battery clip inside Note that the battery can only be connected one way Insert the battery into the battery com partmen...
Страница 6: ...speed setting disc 16 by the raised bars until the ASA speed number is opposite the white ASA index triangle 8 A detailed ASA film speed table is on page 36 I d Exposure Factor Scale Check to make sure that the exposure factor scale 10 index mark 18 is at 1 A more detailled expla nation of this useful scale is on page 9 6 ...
Страница 7: ...er the 0 null line Read the desired combination of f stops and shutter speeds on the computer scales NOTE When you release the power switch the value measured at that moment will be automati cally read and electronically stored by the Luna Pro sbc To conserve battery life the meter switches itself off automatically after 30 seconds and your measurement set on the computer dial remains for convenie...
Страница 8: ...time scale 8h and 1 4000 sec When this occurs the CORRECT reading will be the UPPER part of the scales 8 EXAMPLES ASA 25 000 at HIGHEST LIGHT LEVEL Scales show above 1 4000 sec at 11128 but also below 8 hours at f 5 6 etc Obviously HIGH ASA and HIGH light level add up to SHORT exposure 1 4000 sec at f 128 ASA 0 8 at LOWEST LIGHT LEVEL Scales show above 8 hours at f 2 8 etc but also below 1 4000 se...
Страница 9: ... a correction factor must be applied to the indicated f stop Once determined the correction can be programmed into the exposure correction dial An EV exposure value scale 17 is provided for cameras with shutters calibrated in EV The Luna Pro sbc EV scale is calibrated from 8 to 24 Numerical values are shown for full EV values with intermediate values indicated by short lines at 1 3 EV intervals Ex...
Страница 10: ...ad and hold mode the power switch ON OFF button index mark a must be aligned with the square switch position indicator b Simply depress and release the power switch The meter will automatically read and electronically hold the value of the light level present at the moment when the button was relea sad Because advanced electronic circuitry and a silicon blue cell are used in the Luna Pro sbc the m...
Страница 11: ... difference between the Luna Pro sbc and a conventional meter is that instead of using various points along a complete scale length only one position the null point is used for all rea dings and at all light levels This results in greater accuracy and ease of operation There is no need to change scale ranges or to read different scales When the needle is set at the null point the compu ter instant...
Страница 12: ...can be prog rammed into the exposure correction dial Any readings then will automatically be corrected as taken The exposure correction dial is calibrated to work both in EV exposure value and EF exposure fac tor Two index marks are provided at the center or normal positions for each correction method In addition the red exposure correction signal gives a 12 visual indication any time the exposure...
Страница 13: ...ent readings point the meter toward the light source and take an EV reading null the meter Turn the meter over and read the footcandle value opposite the EV reading just obtained Similarly lux values can also be determined Note that for each change of one EV the footcandle level changes by a factor of 2 This is because the EV scale is equivalent to a full stop scale in that each change of one EV o...
Страница 14: ...re popular and when used properly both are vaiid and will give good results However to evaluate properly the ways in which these two methods function it is necessary to discuss briefly how the meter operates and how film responds to light It is beyond the scope of this man ual to get into a detailed discussion of sensitometry the study of tone reproduction There are many excellent books available ...
Страница 15: ...ases It is broken down into three distinct regions the toe straight line portion and shoulder In order to record detail properly on film the light values long exposure should fall within the range where they intersect the straight line portion of the curve If the exposure falls into the area of the toe or shoulder the film will lose shadow or highlight detail respectively This is because once thos...
Страница 16: ...itions and to allow you to work with different meters and films a reflectance of 18 value and the understanding that it represents a typical aver age is the basis for readings taken with both reflected and incident methods of measurement although under the same lighting conditions differ ent readings for the same scene can be obtained when using both methods depending on subject reflectivity This ...
Страница 17: ...8 standard When the subject is very light decrease the expo sure by 1 2 to 1 f stop When the subject is very dark increase the exposure by 1 2 to 1 stop The amount of change to the exposure will depend on your judgement as to the degree of variation in sub ject reflectivity from an average scene Situations may arise where you have extremes of light and dark subjects all of which are important in t...
Страница 18: ...ll be averaged to give you the final reading If you have one or more objects that are significantly lighter or darker than the rest of the scene the objects will bias the reading away from the average In cases such as this the meter should be moved in closer to the main subjects of interest or one of the acces sory spot attachments used to eliminate the effect 18 of the light or dark areas As an a...
Страница 19: ...e is covered in sections Scene Brightness Range and Zone Systems II i Scene Brightness Range In order to assure proper exposures for highlight and shadow detail in scenes with a wide range of light intensity and subject reflectivity the extent of the lighting range must be determined The Luna Pro sbc is ideally suited for this type of measure ment because of its null meter design To utilize this f...
Страница 20: ...ion would then be to reread the shadow intensity and rotate the computer dial until the meter needle is opposite 2 on the UNDER side which is within the film limits UNOE R OVER 20 Then recheck the highlights which should now read OVER 2 You would then use the new exposure setting indicated on the computer dial The scene brightness range has not changed but the meter has adjusted to your exposure s...
Страница 21: ... that is beyond the total range of film acceptance In these cases the use of fill light to lighten shadows or a gobo n a device to block or modify light such as a dark card to sof ten highlights may be indicated When the proper corrective action is taken he scene brightness range can again be checked to be sure the limits of the film are not exceeded Modify ing the lighting can also be used instea...
Страница 22: ... or use gobos such as when photographing landscapes When these situations arise the exposure levels can be 22 adjusted so that the most important parts of the scene receive proper exposure This can be done with either black and white or color film However some detail either in the highlight or shadow areas will be lost When using black and white film another technique is available to extend the ca...
Страница 23: ... dicated for Zone V is 8 Note the EV values in dicated for the other zone values In this example Zone I EV4 Zone VI EV 9 Zone II EV5 ZoneVIl EV 10 Zone III EV 6 Zone VIII EV 11 Zone IV EV7 ZoneV EV 8 Zone IX EV 12 Now you can take a reading of a highlight area null the meter and note the EV indicated Assuming the highlight reading corresponds to an EV 12 the zone value would then be Zone IX see ch...
Страница 24: ...be determined solely by the meter reading It is therefore important to check the instructions supplied with the film in use to deter mine when reciprocity failure can be expected how severe it will be and how to correct for it Here again the Luna Pro sbc greatly assists in exposure 24 determination because the corrective filters suggested by film manufacturers to adjust color shifts from reciproci...
Страница 25: ...of footcandles and exposure times is basically the same as calcu lation of inteJ mediate values of flstops except that the value y 2 is replaced by 2 in the formula For example you have a footcandle level 1 2 stop above 1000 as represented on the chart on the back of the Luna Pro sbc New footcandle level old level 2 flstop change 1000 2 1000 1 414 1414 25 ...
Страница 26: ...d use a slower shutter_ speed and pan across the field When pan ning the relative speed between the subject and the camera is decreased while the relative speed between the background and camera is increased This results in the characteristic action shot with the main subject sharp and the background blur red For shutter speeds of 1 60 second and longer the use of a good tripod or other camera sup...
Страница 27: ...e snow or sand is itself the most important part of the scene This is an ideal time to use scene brightness range measurements III c Sunsets Sunsets can present a problem in light measure ment because of brightness range Sometimes the sun itself is the most important part of the scene and at other times light reflecting from clouds or distant mountains may be more important You should first determ...
Страница 28: ...iple highlights and shadows with a tre mendously large brightness range In addition direct use of the meter readings will result in a 28 picture that appears more like a daylight photo than one taken at night General y night exposures get into the area of film reciprocity failure It is therefore important to know the characteristics of your film before shooting under these conditions After taking ...
Страница 29: ... people prefer to overlight the corners of the copy to com pensate for lens falloff The exact amount of over lighting varies with the individual situation but 15 20 is common For copy work the Luna Pro sbc can be used with the copy attachment for determining exposure and checking evenness of illumination IIl g Excessive Skylight When taking reflected readings of scenes where there are large areas ...
Страница 30: ...g of the Luna Pro sbc for direct readout of cor rected exposure values The second method gives a corrected aperture only 30 I Extension Factor Lens to film plane distance 2 ens focal lengtW For example assume a 210 mm lens approxi mately 8 is being used with a lens to film plane distance of 14 Extension Factor 14 2 W 196 64 3 06 or approximately 3 In this case set the white index mark of the expo ...
Страница 31: ... not just f stops Another way to determine extension factor is to measure the magnification of the object size at the film plane This is especially useful when working with large format cameras where measurement of the image on the ground glass is relatively easy To calculate the extension factor measure both the actual object size and the size of the image on the _ ground glass These two measurem...
Страница 32: ...rofessionals prefer to measure inci dent light for exposure determination This can be done with the basic Luna Pro sbc but for greater convenience the Luna sphere combines its large 32 integrating sphere with a 3600 swivel head plus capability for a flat plane diffuser into one con venient accessory For photometricaly accurate measurements of footcandles or Lux readings must be taken on a flat dif...
Страница 33: ...e measuring errors with twinlens 1 spot meters The Multibeam Attach ment focuses from maximum measuring accuracy and provision is made for eyepiece correction With this attachment you have the advantages of a separate 1 spot meter for you Luna Pro sbc and it automatically adjusts the meter sensitivity when attached Variable Angle Attachment The modestly priced Vari Angle Attachment locks instantly...
Страница 34: ...e in the range of 28 8 as to 7360 Ixs For a film speed setting of 100 ASA you can read f stops from 2 8 2 3 to 45 2 3 In addition to that a 5 stop range extender is pro vided The measuring time is 1 125 seconds When multiple flashes are required to achieve cor rect exposure at a desired f stop e g for greatest depth of field in interiors or other still subjects the readings of successive flashes a...
Страница 35: ...ographic prints The illumination on the copy board can be mea sured for evenness of various points on the material to be copied It can also be reversed for meas urements of light trans mitted through slides or other translucent mate rial being copied Enlarging Attachment The Enlarging Attachment will help eliminate guesswork in darkroom printing It determines con trast range and correct exposure t...
Страница 36: ... setting your film s color sensitivity into the calculator supplied with the attachment you can at the same time determine the value of correction filters for the light being measured Filter values are given in both deca mired values of Kodak equivalents Ideal for all continuous spectrum sources such as day light and tungsten Not suitable for non con tinuous sources such as flourescent lamps il JR...
Страница 37: ... your Luna Pro sbc Exposure Meter Variable Angle Attachment The EV section of the dial is used When using the 15 position set the index mark opposite 1 1 3 EV When using the 7 5 position set the index mark opposite 3 EV Readings are then taken normally Repro Copy Attachment Filter Optics Probe Set the index mark opposite 3 EVon your expo sure correction dial For complete instructions on how to use...
Страница 38: ... 10 164 2 500 1 1 4 5 18 72 2 4 125 22 8 000 40 05 79 12 7 206 3 180 1 3 5 20 81 2 5 5 160 23 10 000 41 065 1 16 260 4 000 1 4 5 6 22 90 3 6 200 24 12 500 42 08 1 26 20 328 5 040 1 6 6 3 25 101 4 7 250 25 16 000 43 1 1 6 25 413 6 350 1 8 7 29 113 5 8 320 26 20 000 44 13 2 32 500 8 000 2 8 32 128 6 9 400 27 25 000 45 16 2 5 40 630 10 800 2 2 9 36 8 10 500 28 32 000 46 21 3 2 51 794 12 700 2 5 10 40...
Страница 39: ...r Luna Pro sbc with similar or other types of exposure meters cannot be made properly without special laboratory equipment optical bench Do not attempt to open or repair your Luna Pro sbc Service information appears below Service Should your Luna Pro sbc require service send the meter directly or through an authorized dealer in the original packing if possible prepaid and insured to B09 Phot t ot ...
Страница 40: ...ge 40 ASA 25 6 15 Silicon Blue Cell 300 Reflected 1800 Incident 016 to 32 000 footcandles in one range 9 volt Eveready Battery or 9 volt Mallory Duracell Alkaline Battery or equivalent Battery Type MN 1604 43 4 X 13 4 X 2 3 4 81 4 oz with battery 4 5 to 144 fps 8 to 24 1 4 000 Sec to 8 hours f O 7 to f 128 Plus Minus exposure indicated in EV Plus exposure indicated in Exposure Factor 0 8 to 100 00...
Страница 41: ...hnical Uses 151 Ed B 3 Stroebel Leslie View Camera Technique Hastings House Publishers Inc New York New York 10016 Zakia Richard and Todd Hollis Photographic Sensitometry Morgan and Morgan Inc Dobbs Ferry New York 10522 Sturge John Handbook of Photography and Reprography Materials Processes and Systems Seventh Edition Van Nostrand Reinhold Co New York New York 10001 Stimson A Photometry and Radiom...
Страница 42: ...GOSSEN Specifications Subject to Change Without Notice BO PhO C P O Box 506 Ramsey NJ 07446 0506 201 818 9500 FAX 201 818 9177 Printed in West Germany 49116a ...
