form of the wave

Camera：Nikon D300, Lens：Tokina AT-X12-24mm F4DX
Exif：Aperture priority mode, 0EV, ISO= 200, SS= 1/20sec, f=4.5, Focus distance= 24mm, No flash
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Camera：Nikon D300, Lens：Tokina AT-X12-24mm F4DX
Exif：Aperture priority mode, 0EV, ISO= 200, SS= 1/30sec, f=4.5, Focus distance= 12mm, No flash
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Camera：Nikon D300, Lens：Tokina AT-X12-24mm F4DX
Exif：Aperture priority mode, 0EV, ISO= 200, SS= 1/10sec, f=4.5, Focus distance= 15mm, No flash
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Camera：Nikon D300, Lens：Tokina AT-X12-24mm F4DX
Exif：Aperture priority mode, -1.0EV, ISO= 200, SS= 1/50sec, f=4.5, Focus distance= 24mm, No flash