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GND & ND Filters…What the heck?

So there were a couple of comments on this post (actually all the comments!) related to GND and ND filters so I thought a quick post devoted to explaining the two might be appreciated by some readers. Here goes…

GND, or Graduated neutral density filters (also known as just graduated filters) are different from other filters in many ways, one of which is that they are often rectangular rather than circular but the functional difference is that part of the filter is a darker (neutral) colour that fades into the clear sections. The transition from neutral colour to clear can be either abrupt or gradual but the function is the same, reducing the difference in brightness between the ground and the sky. Therefore they are used mostly for landscape photography. GND filters also have numbers which indicate how many stops of light they reduce the brightness by.

ND or neutral density filters reduce light from all wavelengths passing through the lens across the entire filter (there is no clear part of the filter). They have three uses, firstly to reduce the brightness of light, secondly to allow the use of a larger aperature and finally to allow the use of a slower shutter speed. Although they are also useful for landscape photography they are also handy for other outdoor photography.

And in terms of the basics that’s it! Simple eh?

Ray Davis

  • I think that ND filter is one of the best filter to have in your photo bag. As mentioned it helps you to reduce amount of light reaching your camera sensor so you can use slower shutter speeds and/or wider apertures.

  • Cheri

    Thank you! Good stuff. I just sprung for a DSLR and your articles really helped me to decide what I need immediately and what I can live without until I can give up eating. Again, much gras!

  • bigjoe

    so.. which one will be good for shooting movies Indoor and Outdoor…. GND or Variable ND filters in raw shooting… no 3rd party light.. reflector… i like to buy one… when ever the shoot a movie or pics when my subject is bright enough… the sky are always over expose… pls sugest me…

  • bigjoe, graduated nd filters are actually good to fix overexposed sky – you can darken the upper part of the frame with them, so that the sky will be darker – and will fit your exposure. For indoor shooting, imho you don’t need any of these.

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