ND = Neutral Density
here are 3 similar shots taken by using my Pro 90 IS at Botanic Gardens.
Waterfall shot 1 (no filter used)
Shutter speed: 1/320 sec
Aperture: 2.8
Waterfall shot 2 (no filter used)
Shutter speed: 1/40 sec
Aperture: 8.0
Waterfall shot 3 (ND 8 and Polariser filters used)
Shutter speed: 0.8 sec
Aperture: 8.0
As you can see , by adding a ND and polariser , I can set longer exposure to shutter speed to give a smooth effect on the waterfall ...
here are 3 similar shots taken by using my Pro 90 IS at Botanic Gardens.
Waterfall shot 1 (no filter used)
Shutter speed: 1/320 sec
Aperture: 2.8
![153-5391_img_std.jpg](/proxy.php?image=http%3A%2F%2Fhomex.coolconnect.com%2Fmember3%2Fmaxaserver%2Fb13%2Fsurronding%2F153-5391_img_std.jpg&hash=214aae45ccaf411a8f1f91af011b5d75)
Waterfall shot 2 (no filter used)
Shutter speed: 1/40 sec
Aperture: 8.0
![153-5390_img_std.jpg](/proxy.php?image=http%3A%2F%2Fhomex.coolconnect.com%2Fmember3%2Fmaxaserver%2Fb13%2Fsurronding%2F153-5390_img_std.jpg&hash=4968ece0e86527b1d3aa8216101af7a7)
Waterfall shot 3 (ND 8 and Polariser filters used)
Shutter speed: 0.8 sec
Aperture: 8.0
![153-5389_img_std.jpg](/proxy.php?image=http%3A%2F%2Fhomex.coolconnect.com%2Fmember3%2Fmaxaserver%2Fb13%2Fsurronding%2F153-5389_img_std.jpg&hash=faf51a311372dab72f32cd7626de3f6c)
As you can see , by adding a ND and polariser , I can set longer exposure to shutter speed to give a smooth effect on the waterfall ...