Polarizing Filters –
refl ection reduction par
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.
Radiant white clouds against a deep blue sky or saturated fall
colors are no coincidence. Polarizing fi lters (pol fi lters for short)
block the bluish gray veil from the diffusely polarized light of
the sky. They augment the purity of true colors and increase
color saturation. Polarizing fi lters are amongst the most impor-
tant fi lters in (digital) photography. They can be rotated in the
mount, allowing the visible regulation of the elimination effect
in the viewfi nder or on the display. The fi lter factor is two to
three f-stops. The maximum effect is achieved at a shooting
angle of 90° to the sun. For an even effect in the picture, 35
mm (or 28 mm in 35 mm fi lm format) should be the minimum.
The second benefi cial effect of pol fi lters is the reduction of
refl ections on non-metallic surfaces (water, shop windows,
lacquer). Objects behind these surfaces, including writing
behind refl ecting lacquer, are made visible – a fascinating way
to enhance images without using photo editing. Circular pol
fi lters are recommended for digital cameras.
excellence
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