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Using the Variable ND filter
Move the ND filter knob to the highest (darkest)
preset, turn the switch below to VARIABLE and then
turn the switch below that to ND.
The wheel will then adjust the ND level variably.
The variable ND is useful if you want to maintain a
consistent f stop (IRIS) in variable light conditions.
It is a simple way to adjust exposure
without affecting depth of field.
Switch to Variable
Switch to ND
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