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                        01_Cover_1.fm  Page 0  Friday, March 17, 2006  3:38 PM
AUTO ZOOM ELECTRONIC 
FLASH UNIT
OPERATING MANUAL
Please read this operating manual carefully first for proper use.                                                                                                                                                                                                                                                                                                                                          
                    
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                        00_AF540FGZ.book  Page 0  Monday, April 10, 2006  11:42 AM Thank you for purchasing the PENTAX Auto-flash AF540FGZ. In addition to easy daylight sync photography with TTL auto, the AF540FGZ also allows wireless TTL auto (P-TTL  auto) photography and high-speed sync. It is clip-on type flash which enables accurate focus adjustments even in  dark locations with built-in AF-assist spotbeam. PENTAX is a trademark of PENTAX Corporation.                                                                 
                    
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                        00_AF540FGZ.book  Page 1  Monday, April 10, 2006  11:42 AM FOR SAFE USE OF YOUR FLASH UNIT Although we have carefully designed this flash unit for safe operation, please be sure to follow precautions given on  page 2. WARNING This mark indicates precautions that, if not followed, could result in serious injury to the user. CAUTION This mark indicates precautions that, if not followed, could result in minor or medium injury to the user or damage to  the equipment. is a symbol indicating items tha
                    
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                        00_AF540FGZ.book  Page 2  Monday, April 10, 2006  11:42 AM WARNING CAUTION The flash contains electronic circuits that Do not use the flash near anyone’s eyes, as it  operate at high voltages. Do not attempt to may hurt them. Be particularly careful with the  disassemble the flash unit yourself, as there is flash around infants. danger of an electric shock. Never try to disassemble or short the batteries  If internal parts of the flash unit becomes and never try to recharge the non-rechargeable 
                    
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                        00_AF540FGZ.book  Page 3  Monday, April 10, 2006  11:42 AM Precautions for Your Flash Unit ● Never use organic solvents such as paint thinner, alcohol or benzene to clean the flash unit. ● Avoid leaving the flash unit for extend period in places where the humidity and temperature are very high such  as in a car. ● Be careful not to subject the flash unit to strong vibrations, shock or pressure. Use a cushion to protect the flash  unit when carrying it in a motorcycle, car, boat, etc. ● Do not us
                    
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                        00_AF540FGZ.book  Page 4  Monday, April 10, 2006  11:42 AM ■ Cautions Regarding Batteries ● This flash unit uses 4 AA-size alkaline, lithium, or nickel metal hydride batteries. Do not use any other type of  battery. The flash unit may not be able to operate correctly or demonstrate sufficient performance, or the flash  unit itself may generate heat, depending on the type of batteries used. ● AA-size alkaline and lithium batteries themselves are not rechargeable. Also, do not dismantle the batter
                    
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                        00_AF540FGZ.book  Page 5  Monday, April 10, 2006  11:42 AM Table of Contents FOR SAFE USE OF YOUR FLASH UNIT........... 1 Contrast Control Sync Flash............................. 36 Advanced Functions ........................................ 38 Precautions for Your Flash Unit ....................... 3 Wireless Mode .................................................. 38 Cautions Regarding Batteries............................. 4 Slave................................................................
                    
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                        00_AF540FGZ.book  Page 6  Monday, April 10, 2006  11:42 AM Names of Parts  Bounce angle adjustment  Bounce lock release button  LCD panel  Battery chamber cover  Flash mode button  Shoe lock pin  Select button  Flash signal contacts  Adjustment dial  Shoe bracket  LCD panel illumination button/ Format button  Locking lever  Zoom button/ Channel button  Test button/ Modeling button/ Ready lamp  Setting switch  Power switch  Wireless mode button  Sync mode switch 6               
                    
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                        00_AF540FGZ.book  Page 7  Monday, April 10, 2006  11:42 AM    
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                        00_AF540FGZ.book  Page 8  Monday, April 10, 2006  11:42 AM  5P Sync socket   External power source socket   Socket cover  Slave sensor  Wide-angle panel   Catchlight panel   Flash head   AF spotbeam emitter  Auto flash sensor     8                                                                                                                                                                                                                                                           
                    
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                        00_AF540FGZ.book  Page 9  Monday, April 10, 2006  11:42 AM ■ Major bundled items  Stand  Case  Operating manual (this manual)  Certification Opening of  the stand Slide the hot shoe bracket into the opening of the  stand. ● You cannot attach the off-camera shoe adapter F  to the bundled stand. ● When attaching the flash unit to the stand, do not  tighten the locking lever too far. Tightening too  far may cause the locking lever to not lock  sufficiently when the flash unit is removed from  t
                    
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                        00_AF540FGZ.book  Page 10  Monday, April 10, 2006  11:42 AM ■ LCD Panel Indicator  Zoom indicator : (A.Zoom) ➝ (M.Zoom) xxmm = 20, 24, 28, 35, 50, 70, 85 (35 mm format) 35, 45, 55, 70, 100, 135, 150 (645 format) 55, 60, 70, 90, 120, 180, 190 (67 format) 13, 16, 19, 24, 34, 48, 58 (DIGITAL format)  Format indicator : (35mm) ➝ (645) ➝ (67) ➝ (DIGITAL)  Flash mode indicator : (P-TTL) ➝ (A) ➝ (M) ➝ (SB)  Flash exposure : (-3.0 to +1.0 steps, 0.5 step increments) compensation indicator  ISO indi
                    
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                        00_AF540FGZ.book  Page 11  Monday, April 10, 2006  11:42 AM  
        	     When in poorly lit locations and the LCD panel cannot  Auto Check Display be seen, pressing the LCD panel illumination button  If the correct flash output is obtained, the flash mode  (LIGHT) will illuminate the panel for about 10 seconds.  indicator and  () in the viewfinder will begin blinking. Pressing it again will turn off the illumination.  If the auto check display does not blink, the flash output  ● The
                    
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                        00_AF540FGZ.book  Page 12  Monday, April 10, 2006  11:42 AM Inserting the Batteries   Slide the battery chamber cover as shown in the Insert four AA-size batteries, making sure the  1 2 figure to open. plus/minus marking (+, -) match the diagram  inside the battery chamber cover. 12                                                                                                                                                                                                                       
                    
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                        00_AF540FGZ.book  Page 13  Monday, April 10, 2006  11:42 AM Types of Batteries ■ Using the Optional External Power  This flash unit uses four AA-size batteries of the same  Source type, as shown below. Use the optional TR Power Pack-3 (upcoming product,  - Alkaline battery (LR6) sold separately) as an external power source. - Lithium battery (FR6) ● For information on how to use the TR Power  - Nickel-Metal Hydride battery (Ni-MH) Pack-3 and connect to the flash unit, refer to the  (Nickel manga
                    
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                        00_AF540FGZ.book  Page 14  Monday, April 10, 2006  11:42 AM Mounting to Camera 1 2 Remove the hot shoe cover from the camera. 1 Attach the flash unit to the camera. ● The following cameras have a shoe lock pin. When  2 Turn the locking lever of the flash unit in the  attaching the flash unit, turn the locking lever in  direction opposite to that indicated by (FIX➝ )  the (FIX➝ ) direction and lock the flash unit to the  (clockwise from the direction of the LCD  camera with the shoe lock pin. Wh
                    
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                        00_AF540FGZ.book  Page 15  Monday, April 10, 2006  11:42 AM Turning the Power On Sliding the power switch to the (ON) position will turn  on the power. The ready lamp will light up when the  flash is charged. Sliding it to the (OFF) position will turn  off the power. ● Turn the camera on before turning the flash unit  on. ● Please refer to page 38 for the WIRELESS MODE  position. ● When the power is turned OFF and ON again, the  flash mode will be set to P-TTL and the Zoom  position A. Zoom 24mm
                    
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                        00_AF540FGZ.book  Page 16  Monday, April 10, 2006  11:42 AM ● When turning off the flash unit, make sure you  ■ Charging the AF540FGZ with the  turn the power switch of the external power  Optional External Power Source source to OFF. Otherwise the external power  Prepare the external power source TR Power  source may be exhausted.  1 Pack-3 in accordance with the instruction in the  operating manual. ■ Switching the Charging Mode Confirm that the power switch of the flash unit  You can select a
                    
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                        00_AF540FGZ.book  Page 17  Monday, April 10, 2006  11:42 AM ■ Auto Power Off Function ■ Quick Power On Function When the flash unit is left unused for about 3 minutes If the flash unit is mounted on the autofocus cameras,  with the power switch set to the (ON) position, it press the shutter release button half way to turn on the  automatically switches off to save the power. power. ● The Quick Power On function can be utilized  Slide the setting switch up. both when only internal batteries are u
                    
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                        00_AF540FGZ.book  Page 18  Monday, April 10, 2006  11:42 AM Select Button (S)/Adjustment Dial Functions 4 types of settings are available as shown on the following pages for the select button (S) and the adjustment dial.   Procedure Turn the adjustment dial and adjust the blinking  2 number. Press the select button (S) so that the number to  1 adjust is blinking. 18