RISE(UK) Neutral Density ND1000 Filter減光濾鏡
49 / 52 / 55 / 58 / 62 / 67 / 72 / 77mm

$220-$280

RISE(UK) ND1000 Filter can effectively weaken the light. ISO setting in the same aperture can reduce.

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Examples of this use include:
-Blurring water motion (e.g. waterfalls, rivers, oceans).
-Reducing depth of field in very bright light (i.e. daylight).
When using a flash on a camera with a focal-plane shutter exposure time is limited to the maximum speed -often 1/250th of a second, at best- at which the entire film or sensor is exposed to light at one instant. Without an ND filter this can result in the need to use f8 or higher.

-Using a wider aperture to stay below the diffraction limit.

-Reduce the visibility of moving objects

-Add motion blur to subjects

Neutral density filters are used to control exposure with mirror-lenses catadioptric optics, since the use of a traditional iris diaphragm increases the ratio of the central obstruction found in those systems leading to poor performance.