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View Full Version : Forgive my ignorance; ND?


donek
Jul-17-2005, 08:36 PM
Can someone explain the function and pourpose of an ND filter. I've done some searching on the web, but I don't think I'm getting it. It sounds as if it just reduces the total amount of light coming into the camera, thus reducing shutter speed. I'm usually trying to get a higher shutter speed and more light.

Please help.

wxwax
Jul-17-2005, 08:56 PM
Ever seen a river look like a solid, misty mass? How about a waterfall? Ever seen an ocean or a lake look misty and strange? Ever seen trails of traffic lights? Or a ferris wheel that's a circle of light?

All are done by using a neutral density filter to produce ultra slow shutter speeds in daylight or twilight situations. Without the ND filter the camera would be incapable of giving you a slow enough shutter speed to get the desired effect - your shot would be overexposed.

The ND cuts down the light so you can blur water or lights, and not overexpose the image.

http://wxwax.smugmug.com/photos/2553067-M.jpg

Blue Snapshots
Jul-17-2005, 08:57 PM
Can someone explain the function and pourpose of an ND filter. I've done some searching on the web, but I don't think I'm getting it. It sounds as if it just reduces the total amount of light coming into the camera, thus reducing shutter speed. I'm usually trying to get a higher shutter speed and more light.

Please help.If you live in Colorado you should have a Neutral Density Filter in your kit. Beautiful state.... but the lighting here is horrible. I use the ND when shooting anything colorful on a bright sunny day. (ie Flowers, etc). Helps to maintain color without losing sharpness. Can produce a "plastic" look to the colors on occasion but it's a compromise. You can always wait for a Cloudy Day or two but you may be waiting for awhile.

Happy snapshots!!!!
Dan

Mitchell
Jul-18-2005, 05:28 AM
Here's the milky water produced with a 4 second exposure using a 2.0 ND filter. The only way to get these types of shots with enough DOF in daylight.

http://clearwaterphotography.smugmug.com/photos/24998205-L.jpg