Pentax AF-16 User's Manual
Contents
1. and compute a new f number Adjust the camera s aperture ring accordingly ha am ge Flash Intensity 4 Turn the power switch on and focus Shoot any time after the pilot lamp comes on After the exposure is completed the unit will immediately begin charging This is known as recycling which is the time it takes to convert the low voltage from the batteries into the high voltage needed for electronic flash 4 100 Maximum Flash Maximum Flash Potential Potentiale Pilot Lamp Lights mi 0 Recycling Time When not using the AF 16 for long intervals turn off the power switch to save batteries Recycling stops when the unit reaches peak charge however the charge will gradually fall off If the power switch is left on battery energy will be used constantly to restore the charge to its peak Maximum Flash Potential Flash Flash 11 GENERAL POINTERS GUARD AGAINST UNEXPECTED REFLECTIONS The direction in which light is reflected off an object is shown in the illustration It is not always possible to actually see these reflections but precautions can be taken against them Do not shoot directly into highly reflective surfaces as the reflections will be picked up by the lens Even when shooting at an angle care should be taken to reduce reflections Non white and non glare backgrounds are suitable for direct flash while backgrounds such as glass windows and white walls will produce a2. high glare For beautiful prints without glare angle your camera so that the flash doesn t rebound into the lens 12 Incident tight Angle of Angle of reflection incidence Reflected light nr Strongly reflecting surface BATTERY PRECAUTIONS Remove batteries when not using the flash unit for long periods of time Batteries tend to leak if left long in the unit and may cause serious damage e When the pilot lamp no longer lights within 60 seconds after the power switch is turned on or when the charging sound can no longer be heard it is time to repface batteries The unit may still flash even though the pilot lamp no longer lights but such flash is insufficient for correct exposure i e Battery performance tends to deteriorate with batteries that are left lying around for long periods of time Make it a point to use batteries that are fairly new e The AF 16 is not designed for use with Ni Cd batteries which have different characteristics and different voltage ratings e Batteries are very sensitive to cold and performance will deteriorate at temperatures near freezing Performance is restored completely as soon as the batteries are subjected to normal temperatures Keep a set of warm spare batteries in your pocket when shooting in freezing weather substitute them when the others get cold e Batteries will perform better if allowed to rest When doing a lot of shooting turn the power
3. 0 gr exposure table guide numbers for the exposures LIGHT SOURCE lm 2m DISTANCE given in the table as well as for some additional 1 1 4 INTENSITY ASA speeds are listed below GUIDE NUMBER CAMERAS WITH LENS SHUTTERS The guide number is the measure of the brightness When using the AF 16 with lens shutter cameras of the flash in relation to the subject distance shutter speeds below 1 250 should be used Lens Guide numbers vary depending upon the ASA shutters include simple snap shot cameras rating of the film being used To calculate the range finders and some large format cameras guide number in meters multiply the distance in If both X and M synch terminals are provided meters by the f number For the guide number in use the X synch terminal feet multiply the distance in feet by the f number ASA 25 32 64 100 125 160 200 400 800 1600 3200 mi 8 9 13 16 18 20 2 32 44 6 87 No G No 24 27 39 48 54 60 66 96 132 192 264 15 06466 ASAHI OPTICAL CO LTD C P O 895 Tokyo 100 91 JAPAN ASAHI OPTICAL EUROPE N V Weiveldiaan 3 5 1930 Zaventem BELGIUM PENTAX Handelsgesellschaft mbH 2000 Hamburg 54 Lokstedt Grandweg 64 WEST GERMANY ASAHI OPTICAL BRASILEIRA IND E COM LTDA Rua Estados Unidos 1053 Sao Pauio SP BRASIL PENTAX CORPORATION 9 Inverness Drive East Englewood Colorado 80110 U S A Printed in Japan se ree
4. A AA aa NAMES OF PARTS NR Battery compartment Auto Manual selector We eert ji Exposure table Photocell window Reflector Pilot lamp Open flash button ON OFF switch Flash cord socket Flash cord Hot shoe contact SPECIFICATIONS nenn al Type Clip on electronic flash unit with hot shoe contact Guide number 32 ASA 400 in meters 16 ASA 100 in meters Flash control Automatic with two way output selection Flash range Red setting 0 5m 1 54 ft 4m 13 12 ft Blue setting 1 0m 3 28 ft 6m 19 68 ft Sensor reception angle 20 silicon photo diode Angular spread 48 vertical 65 horizontal for up to a 28mm wide angle lens Flash duration 1 40 000 1 4000 sec Color temperature Equivalent to daylight Recycle time approx 6 sec with alkaline batteries 8 sec with mangnese batteries Number of flashes Alkaline batteries approx 200 manganese approx 40 Power source Two 1 5V AA size penlight batteries Other features Open flash button Automatic flash output stabilizer Pilot lamp Color coded exposure table Dimensions 65mm width x 78mm height x 41mm depth Weight 102g 3 5 oz without batteries Accessories Flash cord The AF 16 was designed for today s camera compact light and efficient It features an electronic eye which measures the light reflected from the subject and controls the flas
5. h brilliance for correct exposures Thus there s no more fussing with figures anyone can get perfect flash pictures everytime Moreover the AF 16 can be used with any camera With its light weight and dynamic design it balances well with the camera and permits film rewind while it is mounted to the camera AF 16 FLASH CONTROL The AF 16 features two way output selection Even when you change the distance between the subject and the camera while the subject is within the effective flash range correct exposure can be obtained without changing the f number FULLAND EVEN LIGHTING OVER A WIDE SPREAD AREA The AF 16 easily takes care of the narrow spread of illumination required for a standard lens and more Its illumination spreads over a wide area to offer full and ample coverage for a 28mm tenses thus giving rich and well illuminated flash pictures SETTING UP INSERTING BATTERIES 1 Slide the battery compartment cover located on the right side of the AF 16 open as shown in the photo Insert two penlight batteries in accordance with the polarity symbols on the inside of the battery compartment 2 Slightly depress the batteries and slide the battery lid closed 3 Slide the unit s hot shoe bracket into the camera s hot shoe This ts easier if you grasp the unit at the bottom near the bracket 4 If you are using a camera without a direct contact hot shoe attach the accessory flash cord to both the flash cord socke
6. switch off intermittently even when the unit is charged to rest batteries 13 AF 16 Flash Duration Characteristic 1 2 1 e 1 4000 sec duration of 1 2 peak level on manual 0 1 2 3 4 5 ms E mern The duration of the flash at the half peak value is a very fast 1 4000 sec which in dark place is equivalent to the extremely fast shutter speed of 1 4000 sec Consequently camera movement will not blur images and very sharp and clear pictures will be obtained 14 pira IL OLE Pehle EE Aa he RE The color cast or temperature of the AF 16 is 5 800 K Kelvin which is compatible with that of normal daylight Tungsten tight bulbs have a temperature of 2 800 and the evening sun is 3 200 K Thus electronic flash has a higher temperature than tungsten bulbs and can be used freely with daylight films in rooms lit by tungsten bulbs without producing a reddish cast io ANS ES LIGH INTENSITY Brightness light intensity drops off as distance fram the lighting source increases As brightness drops off with the square of the distance from the light source to the subject light intensity at a distance of 2 meters from the camera will only be 1 4 of the value it is a 1 meter Thus all else being equal objects two meters from the camera will require four times the exposure as those Although all of the practical exposure data needed 1 meter from the camera for operating the AF 16 is computed in the 3
7. t of the AF 16 and to the camera s X synchronization X synch terminal TEST YOUR UNIT BEFORE FILM LOADING 1 Turn the power switch to ON Soon you will hear a faint whine which indicates that the unit is charging The pilot lamp will come on ina few seconds then the charging sound will cease At this point test the flash circuit by pressing the open flash button with your finger 2 After the unit has flashed it will immediately begin to recycle The next time the pilot lamp comes on press the camera s shutter release button If the flash and the shutter synchronize everything is fine If not check that the unit is Mounted properly or that the flash cord is connected properly if you are using one SHOOTING 1 Set the shutter speed dial to the X setting for nash synchronization 2 The AUTO section of the table on the A E E e ee e e E p back of the AF 16 permits a choice of two f numbers which differ according to MOS i DE y i the film s ASA rating For close and E ie a es SR aa aa intermediate distances use the red setting a Se See YS as A N for longer distances use the blue setting E For example if you are using ASA 400 film the f number to use at the red setting is 1 8 for the blue setting it is f 5 6 The exact range of flash effectiveness at either setting is indicated by the figures in light green at the ends of the AUTO table 3 Next set the camera s aperture ring to the f n
8. umber indicated on the table and the output selector on the side of the AF 16 to the dot matching the color of the f number chosen 15 2 8 m 45 2 t 12 M Po e 2 16 1 85842 24 Flash Intensity umm 4 Switch the power on advance the film and wait for the pilot lamp to come on The capacitor will reach peak charge shortly after the pilot lamp comes on Focus and press the shutter when ready Although the AF 16 will flash sufficiently if fired immediately after the pilot lamp comes on it is best to wait a moment or so longer for a Righer flash 410r Maximum Flash Potential Full Charge _ a Pilot Lamp Lights 0 5 20 15 20 New Batteries Old Batteries 25 sec lve ee len da 2 When using the AF 16 on MANUAL the lower section of the exposure table is employed for computing the correct f number based on subject distance and ASA film speed If the subject is 2 meters 6 feet away and you are using ASA 100 film for example pick out the number in the ASA 100 column which corresponds to the subject distance Thus the f number to use is f 8 16 22 5 1 3 Set the aperture ring of your camera to the f number indicated by the exposure table and then set the output dial on the side of the unit to M The computed f number is effective as long as the subject remains at the same distance Each time you shoot at a different distance however refer to the exposure table
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