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LOADING BATTERIES

Make  sure  the  ON/OFF  switch  is  in  OFF  position. 

Slide  open  the  battery  cover  and  insert  2  x  AA 

batteries in the direction shown by the symbols in the 

battery  compartment.  Close  the  battery  cover. 

Inserting batteries with the wrong polarity may cause 

the  batteries  to  overheat,  leak,  explode  and/or 

damage the flash. Switch the ON/OFF switch to the 

ON  position. The  ready  indicator  will  light  within  a 

few  seconds  if  the  batteries  are  properly  installed. 

When you need to replace the batteries, be sure all 

of  the  batteries  are  the  same  brand,  type  and 

capacity.

ATTACHING THE FLASH TO YOUR 

CAMERA

The flash can be mounted directly onto camera’s hot 

shoe  socket.  If  hot  shoe  socket  contacts  on  your 

camera do not match the contacts on the foot of the 

flash, do not mount the flash onto the camera. If the 

contacts do not match, your camera or flash may be damaged. If you do not 

have  a  hot  shoe  on  your  camera,  the  flash  may  be  connected  using  the  

synchro cord (included) to connect to the camera’s PC sync terminal.

USING THE FLASH

Switch the flash to the ON position. Refer to the Exposure Table on the back 

of the flash, estimate the camera to subject distance and note the film speed 

in order to get the correct camera lens aperture setting. The aperture can be 

calculated using this formula: 
Aperture (f) = guide number (GN) / flash to subject distance (m)
Example: Flash Used = FM650
Film speed: ISO 100; Flash to subject distance: 5.0m
The correct aperture should be f4.

CAUTION

•  This flash unit is not for use with a camcorder.
•  Do not leave or store the flash unit at temperature exceeding 40º C. This  

  might adversely affect the internal structure or performance of the flash  

  unit.

•  Do not leave the flash unit in your automobile during the summer.
•  Remove the batteries if you do not intend to use the flash unit for a long  

  period of time.

•  The flash unit is not water-resistant. Rain and humidity may cause    

  irreparable damage to the flash.

•  The flash unit is composed of very delicate electronic  

 

parts. It should be protected against shock, falls or  

 

other improper handling.

•  The flash unit contains a high voltage condenser. Do  

  not try to open the housing or repair the flash.

•  Do not clean the surface of flash unit by petroleum  

  distillates, detergents or strong solvents. These can  

  cause damage to the flash.

SPECIFICATIONS

1. Flash Head

2. Mounting Foot

3. Battery Cover

4. Ready Indicator            

    / Test Button

1

2

3

4

5

8

7

6

5. Lock Switch

6. Synchro Socket

7. On / Off Switch

8. Exposure Table

Thank you for your purchase of a ProMaster electronic flash.This electronic 

flash may be used with both digital and film cameras. Your flash uses a low 

voltage  and  low  current  triggering  system  to  provide  protection  for  most 

digital cameras. Please take few minutes to read these instructions before 

using your flash.

Specifications and design are subjecct to change without notice.

FM650

Manual Electronic Flash

Instruction Manual

Guide No 

66(ft)/20(m)

(ISO 100 / DIN21)
Flash Coverage  

45˚ vertical x 60˚ horizontal

Power source  

2 x AA (1.5V) Batteries

Recycling time  

Approx. 5 seconds with fresh batteries

Weight w/o batt.  

Approx.105g

Dimensions 

63x60x90mm

Accessories  

Synchro cord

FM650

Made in China

Code 9090

WWW.PROMASTER.COM
FAIRFIELD, CT  06825

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