Gray Filter (ND Filter)
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Kase ND Filter for screwing
The Kase Neutral Density Filters are great for adjusting the amount of light that gets through to the camera sensor. The resulting longer exposure times can be used, for example, to capture the movement of clouds or to draw water as soft as silk. Due to the different strengths, graded in ND8, ND16, ND64 and ND1000, the right filter should be there for every situation you encounter.
The Kase Wolverine series scores with excellent color neutrality. This is due to the high-precision optical glass we use, which is also very shatterproof. In addition, the filters are very easy to clean thanks to an oil and water-repellent coating. If you do not yet have a filter holder for your lens, you can find it together with the filters in our kits or separately in the filter holder category.
Calculating the shutter speed when photographing with an ND Filter
Calculating the appropriate shutter speed with an on-lens ND filter is a fairly simple process that requires just a few steps and a calculator comes in handy. In addition, we recommend that you always work with a tripod, because with exposure times of sometimes several seconds, the image is blurred for most photographers without a tripod. To bring you closer to the steps, we have listed them below for you:
- Then you add a gray filter, for example the Kase ND1000 100x100 mm. The 1000 indicates how often the previously determined shutter speed has to be multiplied as soon as the filter has been mounted, since 1000 times less light falls on the camera sensor. Because of this, the shutter speed is increased by a factor of 1000.
- If you have a shutter speed of a fraction of a second, as is the case here, it is best to give the value in seconds first. Because 1/30 of a second equals 0.0334 seconds.
- This value is then multiplied by 1000, which means 0.034 x 1000 = 33.4 seconds. This is then the new shutter speed required to get a shot with the same exposure with the ND1000 gray filter in front of the lens. For example, in the camera's default mode, 30 seconds can be used, which is the closest value that can be set. Or with the help of a timer remote control, an exposure of 34 seconds can be set.
- First you install all the filters with the exception of the ND filter, that is, the polarizing filter and, if necessary, the GND filter. Then you take a correctly exposed test shot that you like and note the exposure time. For example 1/30 second.
Example for calculating the exposure time with a Gray Filter
If the camera gives you an exposure time of 1/50 seconds without a filter and you have an ND 1000 filter in front of the lens, the new exposure time is 1/50x 1000 = 20 seconds. When using an ND 64 filter, it would be 1/50 x 64, i.e. 1.28 seconds.
With a basis of 1/10 or 1/100, the calculation is still relatively simple, but it becomes difficult when you start with exposure times like 1/250 or 1/320. Unless you're an ace at mental arithmetic, it can get difficult.
Then either the pocket calculator of the smartphone has to be used, or you download an app directly that takes over this task and thus makes it easier.