A regular grduated ND filter - dark at one end and light at the other
A regular GND flipped the other way around - that way of reversing things doesn't work, does it?
ND Filter: A neutral density (ND) filter is a must for waterfall shooting.
ND filter
Stands for Neutral Density filter - a neutral grey filter that can be placed in front of a the lens to help block some ambient light from reaching the camera's sensor, thereby allowing a longer exposure to be achieved.
NiMH ...
ND filter:
Short for neutral density filter; used to reduce the amount of light passing through a lens without altering the image's color or tonal rendition.
negative: ...
ND Filter
A type of filter that can be attached to the lens. This adjusts the amount of light that enters the lens without affecting the picture color.
ND filters are specified by their light-reducing ability, where stronger filters appear as darker shades of gray. Some common specifications are summarized below:
Filter Strength
(in f-stops)
Filter Terminology: ...
ND Filter
- Off
- On
Engages the ND filter, which reduces the light reaching the sensor by 3 stops ...
ND filters, or Neutral Density Filters reduce the amount of light that gets in the lens in a balanced way (as opposed to a polarizing filter, for example).
ND Filter
When you use a Neutral Density (ND) filter on your lens, it allows you to optically cut out the amount of light going through the lens, but otherwise does not [ideally] affect image quality.
ND filters are just another way of affecting exposure, so it should come as no surprise by now that they're measured in stops. How strong a filter you need depends on your requirements.
A wind filter built into a camera digitally reduces the noise caused by wind blowing across the microphone.
Grad ND filters are used when the dynamic range of a scene exceeds the capabilities of the camera (film or digital) to record detail in both the brightest and darkest part of the scene. The go from clear on one side to a neutral .6D (2 stop) or 0.
Using ND Filters with Strobes or Sunlight-AdoramaTV
Digital Photography 1 on 1
view Comments (2) ...
The second filter is a Polarizing filter which is useful for removing reflections of water surfaces and in windows. When shooting landscapes, you will also see the sky getting a much darker and richer blue color when using a polarizer filter.
Ten-stop ND Filters are a useful addition to the landscape photographer’s kit bag.
To use a graduated ND filter properly, there are a few keys to keep in mind. The most important fact to remember is to use the DOF preview button to accurately position the dark part of the filter over the light area of the image.
If you insert a second filter between the lens and center filter you run the risk of having the sides of the image slightly too light.
When you desire to reduce the depth of field but maintain a given shutter speed, ND filters permit the use of a larger f/stop which in turn, reduces the depth of field.
4X and 2X teleconverter (used only with the 300mm f-2.8 lens), flash, tripod, polarizing filter, graduated ND filter, 81B filter, set of extension tubes, cable release, lens hoods, lens cleaner and tissue. To be added later: 100mm f-2.
While the aforementioned ND filters are a necessity for any serious landscape artist, be cautious when considering the purchase of a UV filter. Generally these filters don't provide much impact, and can in fact reduce the ultimate image quality.
The advantage of taking photos during a full moon is that we can use slow shutter speeds without using an ND filter and we will get the same ambient lighting as that of an afternoon.
9 soft edge grad ND filter. This is also known as a three stop ND. It blocks three stops of light on the darker portion of the filter while letting the normal amount of light pass through the clear bottom portion. The filter on the right is a 1.
In some filters, half ND filters can be very effective to lower the contrast, esp the sky to achieve more balance effect. Lens like reflex lenses, where its aperture is fixed, ND filter can be the only way to play around with exposures.
Note that I don't own a Cokin grad ND filter. This is simply because they don't sell any. They only sell a grey filter, which apparently tints the image slightly. So I went for the HiTech filter, which is allegedly true neutral-density.
To get these very slow speeds in bright light you'll need to use a low ISO, narrow aperture, and an neutral density filter (ND filter). Think of a ND filter as a pair of sunglasses for your camera.
A second filter must be placed in front of the camera lens, to exclude residual ultraviolet and allow the resulting fluorescence excited in the sample by the UV source. This filter is called the "barrier" filter.
neutral density filter (ND filter)- A filter used to reduce the amount of light entering the lens.
noise / noise reduction (sensor) ...
While there are sophisticated mounting systems for an ND filter, you can simply hold it in front of the lens, or use gaffer's tape to keep it there. Left your filters at home?
For high contrast scenes having a 2-stop and 3-stop ND filter allows me to fit the dynamic range of the scene into a single image. They scratch more easily than I'd like, but I don't know of any better ND filters than these.
Flash Cards ...
With 0.9, 3 f-stops grad ND filter
.
There are times when two filters are required, combined, like in the sunrise image at right, which needed both a 2 and a 3 f-stops graduated density filters, the second one placed diagonally.
I'm with Caio, I was expecting to see some insight about regular ND filters. The only problem (if you wanna call it that) of this particular method, well, is price itself.
ND filters are available in a range of strengths. Again, I recommend 0.9, which reduces the power by 3 stops. It's better to over-reduce and turn the power up than to carry a stock of different filter strengths.
Typically ND filters are used when shooting in bright light to allow for a larger aperture and consequently a smaller depth of field. With a smaller DOF, you can make the background less distracting by letting it blur.
I tried to do a long exposure shot of a lake & clouds in the middle of the day but my shots either blew out or were too dark. I used to ND filters to make up to ND10 - a ND2 & ND8.
Filter for use in front of the lens that absorbs all visible wavelengths to a more or less equal extent. ND filters can be used with both monochrome and color films, since they have no effect on color balance.
Noise ...
NEUTRAL DENSITY FILTER - Filter for use in front of the lens that absorbs all visible wavelengths to a more or less equal extent. ND filters can be used with both monochrome and color films, since they have no effect on color balance.
In its simplest form, it contains one Canon EOS-1Ds Mark II body, four lenses, 16 gigs worth of CF cards, a Canon intervalometer, several ND filters for slower shutter speeds, an extra camera battery and some peripherals.
Neutral Density Filter A neutral density or ND filter. It reduces the amount of transmitted light without affecting color balance; especially useful when you want to control aperture or shutter speed in brightly lit situations.
While you can achieve a long shutter exposure easily at dusk and dawn, what if you want to use a long exposure during the day? The trick is to get yourself a strong ND filter (neutral density), which cuts out nine or 10 stops of light.
The "exposure triangle" omits a fourth factor - LIGHT! Yes, light can be controlled. You could reduce the light by using a diffusion panel (or an ND filter). You can increase light by adding light sources.
ND filters, as they are commonly referred to, are available in different strengths. They can absorb from one to three f-stops of light.
There are different ways of attaching filters, for instance screwing a round filter in front of the lens, or sliding a square or rectangular filter in a filter holder which is attached to the lens with an adapter ring.
The range can be increased by using a faster film or more sensitive CCD, and reduced by diffusing the light source using ND filters or material. The range quoted is usually based on using ISO 100 film or a CCD with equivalent sensitivity.
easier to correct later on in software. Defocus is not; it'll differ on the same lens depending on aperture and subject distance, and varies again from lens to lens.) If you need to stop down because you want a longer exposure, purchase an ND filter.
In this case, the photographer may resort to one of the many methods used to handle large dynamic ranges (e.g., split ND filters, fill flash, or digital blending of images taken at different exposures).
 See also: Filter, Camera, Image, Light, Photograph
  
|
RSS
