Canon Command Back
70/80/90

(4) Setting the 4-digit Frame Counter Number
You can record the frame counter number from Fc 00 01 up to Fc 99 99 on the film in sequence.

EXAMPLE

1. Select the data recording function by pressing the data/timer selector.
2. Select the 4-digit frame counter number mode (Fc 00 00) by pressing and releasing the mode selector.
3. When the position selector is pressed once, the right 2 digits (00) will start flashing.
4. Press the number set button once while the 00 is flashing to set 01.
5. Press and release the position selector twice to stop the flashing. The frame counter reading automatically advances with the frame counter of the camera, as each exposure is made.

Notes:
· If you want to start the frame counter reading from Fc 00 01 again on the second roll of your film, reset to Fc 00 01 again.

· If you want to continue the sequential numbering after your first roll of film has been finished, there is no need to reset the frame counter reading on the second roll of film. The sequential number is set automatically since the frame counter reading on the LCD panel does not advance during automatic film loading. The frame counter reading from Fc 00 01 to Fc 99 99 can be automatically set and recorded in this manner.

· When continuous shooting is done in this mode at low temperatures (below 5°C/37°F), the recorded number may not appear clearly.

· With the Command Back 90, recording of the frame counter number cannot follow continuous shooting.

9. Setting Each Mode of the Timer Control Function.

1. Operation of the timer control function can only be started by pressing the start/stop/clear button. Pushing the camera's shutter button will not start timer control function operation.

2. Operation of the timer control function stops automatically after the specified operations have been completed. However, if you want to manually stop operation, press the start/stop/clear button once again.

3. Operation of the timer control function is possible only when a mode of the timer control function is displayed on the LCD panel. If a data recording function mode is displayed, the timer control function will not operate even when the start/stop/clear button is pressed.

4. To set the timer control function with the Command Back 90, set the T90 for continuous shooting.

5. Do not set the self-timer on the camera itself when the timer control function is used.

6. Be sure to check that "OFF" is set in the data recording function if you do not want to record any data.

7. If you want to take a picture manually during timer control function operation, it is possible to shoot by pressing the camera's shutter button. Please keep in mind that operation is in progress and the frame counter reading will move forward to the next frame when that mode is set. (See pp. 20-21 )

8. Be sure to cover the camera viewfinder with the eyepiece cover to keep light from entering at the rear.


(1) Setting the Self-timer
The self-timer of the Command Back can be set in 1-sec. units to any delay from 1 sec. to 23 hrs., 59 mine., 59 sees.

EXAMPLE 
When you want to take a picture after a delay of 2 hrs., 15 mine., 30 secs.

1. Select the timer control function by pressing the data/timer selector.
2. Select the self-timer mode by pressing and releasing the mode selector.
3. When the position selector is pressed, the 00 on the right will start flashing.
4. Press the number set button while the 00 is flashing until 30 appears.
5. Correct the 00 in the middle to 15 and then the 00 on the left to 02 following the same procedures as In steps 3 and 4.
6. Press the position selector once again to stop the flashing.
7. To start the self-timer, press the start/stop/clear button once.

(2) Setting the Interval Timer
The interval timer can be set in 1-sec. units to any value from 1 sec. to 23 hrs., 59 mine., 59 sees.

EXAMPLE When you want to release the shutter every 5 mine., 30 sees.

1. Select the timer control function by pressing the data/timer selector.
2. Select the interval timer mode by pressing and releasing the mode selector.
3. When the position selector is pressed, the 00 on the right will start flashing.
4. Press the number set button while the 00 is flashing until 30 appears.
5. Correct the 00 in the middle to 05 following the same procedures as in steps 3 and 4. (The 00 on the left should remain the same in this case.)
6. Press the position selector once again to stop the flashing.
7. To start the interval timer, press the start/stop/clear button once.

Note:
· In the case of the Command Backs, the interval timer mode must be set longer than the sum of the shutter speed and the winding time.  Otherwise, the camera will continue shooting regardless of the interval timer setting.
When the T90 is set for single exposure shooting, the camera stops after a single exposure.

(3) Setting the Long Release Timer
The long release timer mode can be set in 1-sec. units to any value from 1 sec. to 23 hrs., 59 mine., 59 sees.

Bulb must be set on the camera when using the long release timer mode.

When an AC lens is mounted on the T80, the long release timer mode can not be used, since it is impossible to set the camera to bulb when an AC lens is mount

EXAMPLE 
When you want to keep the shutter open for 4 hrs., and 15 min.

1. Set the camera to "bulb."
2. Select the timer control function by pressing the data/timer selector.
3. Select the long release timer mode by pressing and releasing the mode selector.
4. When the position selector is pressed twice, the 00 in the middle will start flashing. (The 00 on the right should remain the same.)
5. Press the number set button while the 00 is flashing until 15 appears
6. Correct the 00 on the left to 04 following the same procedures as in steps 4 and 5.
7. Press the position selector once again to stop the flashing.
8. To start the long release timer, press the start/stop/clear button once.

(4) Setting the Frame Counter
The number of pictures to be taken can be set from 1 to 99.

EXAMPLE 
When you want to take twelve pictures in succession.

1. Select the timer control function by pressing the data/timer selector.
2. Select the frame counter setting mode (00) by pressing and releasing the mode selector.
3. When the position selector is pressed once, 00 will start flashing.
4. Press the number set button while the 00 is flashing until 12 appears.
5. Press the position selector once again to stop the flashing.
6. To start taking pictures, press the start/stop/clear button once. After the camera has finished taking the twelve pictures, operation will automatically stop.

Note: If the frame counter of the Command Back is set to 00, shooting is impossible even when the start/stop/clear button is pressed.


(5) Multiple Exposure: for the Command Back 90 only
When taking multiple exposures using the timer function, set the number of frames to "02". In this case, one extra frame will be exposed after shooting.

(6) Automatic Flash photography: for the Command Back 90 only
The interval timer or self-timer can be used for automatic flash photography with the Speedlite 300TL or Macro Ring Lite ML-2, which are designed exclusively for the T90.

To prevent unnecessary battery consumption, set the main switch of the Speedlite 300TL or Macro Ring Lite ML-2 to the "SE" position. If the interval timer is set for longer than 5 minutes, the power to the flash unit is automatically cut off, and the signal is transmitted from the Command Back 90 to charge the flash one minute before shooting, so the power is automatically turned on.

10. Combining Various Modes 

General Information and Notes
1. The Command Back can be programmed as desired by combining various modes.
  1) Combining all modes of the timer control function is possible.
  2) Any mode of the data recording function can be combined with any individual mode of the timer control function.
  3) Any mode of the data recording function can be combined with multiple modes of the timer control function.

Therefore, there are 11 possible combinations in 1 ) above, 16 possible combinations in 2) and 44 complex combinations in 3). This is excluding the case of the OFF mode and regarding all three displays of the date mode as one mode. In the case of the Command Back 80, however, there are 4 possible combinations in 1), 12 combinations in 2) and 16 complex combinations in 3). This is because the long release timer mode can not be used when AC lenses are mounted on the T80. Refer to the table below on the type of exposure made with each combination.

Functions 1 - 7

Functions 8 - 15

2. When the timer control function is combined with the data recording function, the LCD panel display will appear as follows: 
1) The LCD panel automatically switches to the data recording function display as soon as the start/stop/clear button is pressed. The mode which will be recorded is displayed. The timer control function is indicated by the "***" mark pointing to the mode in operation.

2) If "OFF" is set in the data recording function, the LCD panel will not switch to the data recording function display. In this case, the timer control function mode in operation at the time is displayed and counts down as soon as the start/stop/clear button is pressed.

3. Be sure to set the data recording function to "OFF" if you do not want to print anything.

4. Do not set the self-timer on the camera itself when the timer-control function is used.

5. If the frame counter is set to 00 while any other mode of the timer control function is set the number of exposures will not be limited, the camera will continue to take pictures until the end of the roll is reached. (See p. 29)

6. When the data recording function and the timer control function are used together at low temperatures (less than --1 0°C or 22°F), please use the self-timer mode at a setting of approx. 5 sees. This is because the response speed of the LCD is reduced at low temperatures.

7. Be sure to cover the camera viewfinder with the eyepiece cover to keep stray light from entering at the rear.

EXAMPLE 1
When you want to use the interval timer mode set at 4 hrs., 15 mine., and the long release timer mode set at 10 sees.

1. Set the camera to "bulb."
2. Select the timer control function by pressing the data/timer selector.
3. Select the interval timer mode and set it to 04:15 00.

4. Select the long release timer mode and set it to 00:00 10
5. Press the start/stop/clear button to start operation.

EXAMPLE 2
When you want to use the self-timer mode set at a delay of 45 mine., the interval timer mode set at 1 hr., 30 mine., the long release timer mode set at 20 sees., the frame counter set ting mode set at 7 exposures, and the 4-digit frame counter mode to record sequential numbering on the pictures.

1. Set the camera to "bulb."
2. Select the data recording function by pressing the data/timer selector.
3. Select the 4-digit frame counter mode and set it to Fc 00 01.
4. Select the timer control function by pressing the data/timer selector.

5. Select the self-timer mode and set it to 00:45 00.
6. Select the interval timer mode and set it to 01:30 00

7. Select the long release timer mode and set it to 00:00 20
8. Select the frame counter setting mode and set it to 07
9. Press the start/stop/clear button to start operation.

Note: Be sure the camera is set to BULB.