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CMS-XML 155A Speedlite : How to set the aperture setting on the Speedlite
The f/stop fixed by the AUTO/MANU switch is the value below the aperture index mark of the same color as the switch position. For example the AUTO/MANU switch is set at the red position, the f/stop below the red aperture index mark is used for AE flash photography. The f/stop will change depending on the setting of the ASA film speed.
CMS-XML 155A Speedlite : How to read the Auto Shooting Distance Range scale.
Depending on the f/stop selected, the auto working range that can be correctly exposed will change. For this purpose, the color of the line along the aperture scales indicates the distance range effective for AR flash photography in accordance with the color of the mark on the AUTO/MANU switch. Therefore you can understand the limit of the auto working range depending on the color of the line below the distance scale.