The dial on the top does nothing to the flash. It's just a guide, like a simple ruler.
Example:
You just set your ASA/ISO (Yellow Line) to Orange DIN/ASA Number to match your camera's ASA/ISO.
Then just read those Scale of F Stops to outside to get FT/M (Feet or Meter).
The true meter from flash is on Handle of flash:
Set Orange Horizontal Line to ASA/ISO Number to match camera.
Set Left Slider, push up & down, to the F Stop that you wanted to shoot.
You have 6 Auto Sensor F Stops
1 for M (Motordrive)
1 for W (Winder)
Hope they are helpful on all photographers using Metz 60CT-1 Flash.
Truly,
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