+--------------------------------------------------------------------+
| Part I: 1 f-stop GND (soft) | (a) apply a Singh Ray Vari-ND filter on the whole frame that
| | reduces 7 f-stops light to achieve a slower shutter speed
| | / / / |
| | | \ \ \ Reeds | |
| | | | | | | | (b) apply a 1 f-stop GND (soft) to get correct exposure on the
| | | | | | | sunlight shed on the reeds and capture more details of clouds
|----------------------------------------------------------------------------+
| Part II : no GND |
| |
|-----------------------------------------------------------------------------+
| Part III: 2 f-sto GND (soft, placed up side down) | | (c) apply a 2 f-stop GND (soft) up side down to reduce the high light of
+---------------------------------------------------------------------+ | the lower part of foreground water which will balance the light of
| Part II and reveal the detail under water rocks
P14 filter 使用示意图。