Setting Fill-Flash Ratio Control - Quantum Qflash QF21 Instructions

automatically switched to the "Sens" mode. The internal sensor in the Qflash is disconnected and the light
output from the Qflash is controlled by the remote sensor. Set the same aperture and film speed for both the
Qflash and the camera. The distance shown on the Qflash is direct flash distance between the Qflash and
subject. The distance is only a guide and depends on subject, F/#, reflector position and power pack.
"Man" mode - If you set the Qflash to manual mode the remote sensor only performs sync function. Set the
desired aperture on the camera and the required power setting on the Qflash.
"TTL" mode - The remote sensor does not support TTL function even if the camera has TTL capability.

5.0 SETTING FILL-FLASH RATIO CONTROL

It is possible to control the ratio of flash light to ambient as follows:
a) Set the camera to aperture priority automatic and Qflash to Auto. Set the same ISO film speed on both.
b) Set the Qflash F/# equal to, or less than, the camera's F/# setting.
c) The lighting ratio will be according to the table below:
Qflash F/stops Approx. ratio-
below camera flash ambient
0
(same setting)
1/3
2/3
1
1 1/3
1 2/3
2
3
4
For example: set the camera to F/8, set the Qflash to F/5.6. The light ratio will be 1:2
Diag. A
QF21 mounted to camera with hot-shoe
contacts.
1:1
1:1.3
1:1.5
1:2
1:2.5
1:3
1:4
1:8
1:16
Camera without hot-shoe contacts:
QF21 mounted to flash-shoe with PC sync cord adapter, (PC sync
cord adapter purchased separately).
Diag. B