Hoya Y5ND2049 Fiche technique télécharger pdf (Page 29)

How to select the correct Polarizing Filter

Two kinds of polarizing filters are the PL (Linear Polarizing) and

PL-CIR (Circular Polarizing) filters which have the same effect of

reducing glare, however, there are differences in the way each works

in combination with your specific camera so it is important to

research and choose the correct version of filter for your camera.

Many of today's cameras use semi-silvered mirrors or prisms to split

the light (a.k.a. beam) entering the viewfinder in order to

calculate exposure and focusing distance. PL filters can sometimes

interact with these light controlling devices to give unpredictable

exposure or focusing. If your camera, whether auto or manual, is

equipped with this kind of device, we recommend using a PL-CIR filter.

Both types of filters allow you not only to remove unwanted

reflections from non-metallic surfaces such as water, glass etc., but

also filter out atmospheric haze enabling colors to become more

saturated and appear clearer with a much sharper contrast.

These effects will prove to be invaluable to photographers at any

level of interest.

for Film & DigitalGENERAL FILTERS

Without Filter

With PL-CIR Filter

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Hoya Y5ND2049 Fiche technique Page 29