grad ND filter VS Circular Polariser

[yumyum]

wat's the differences btw grad ND filter and Circular polariser.. anione help to enlighten

 

[yyD70S]

Polarizer

http://www.luminous-landscape.com/tutorials/polarizers.shtml



GND

http://www.singh-ray.com/shawarticle.html

 

[XC Pictorial]

Mainly Neutral Density filter only reduces the overall exposure. Whereas a CPL actually polarises, meaning only allow light in certain planes to pass through. I prefer a CPL because rotating before taking a picture produces interesting effects.

xc

 

[Denosha]

yumyum asked about the grad ND filter not the normal type. Anyway, the link posted by yyD70s is a good read.

Here's a practical example of how it's used (Cokin grad grey ND8):

Without the filter, there won't be the blue gradient in the sky. In fact, the sky would likely be blown out white/grey.