Hoya Y0667 Fiche technique télécharger pdf (Page 42)

SPECIAL EFFECTS FILTERSfor Film & Digital

For wider apertures or longer exposures

ND(NEUTRAL DENSITY) X2 X4 X8

Neutral Density filters are often ignored by photographers, but they have

several uses and offer the possibility to get otherwise unachievable

results. ND filters appear grey and reduce the amount of light

reaching the film. They have no affect on color balance. There four

main uses are:

To enable slow shutter speeds to be used, especially with fast

film, to record movement in subjects such as waterfalls, clouds,

cars, the sea, etc.

To decrease depth of field by allowing wider apertures to be used,

which helps separate subjects from their background.

To decrease the effective ISO of high speed film (i.e., above ISO

400) and allow it to be used outdoors in bright situations.

To allow movie and video cameras (which have fixed shutter

speeds) to film subjects such as snow, sand or other bright

scenes which would normally cause overexposure.

Without Filter

With ND X8 Filter With ND X4 Filter

With ND X2 Filter

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Hoya Y0667 Fiche technique Page 42