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The 81 Series of filters control the bluish colouration that affects daylight film. They can also remove excessive blue from the effects of electronic flash. Good for general scenics when the photographer wishes to remove the bluish cast from open shade or just add warmth to the photograph.
Whereas the 81 Series of filters creates a feeling of warmth, the 82 Series creates a feeling of coolness.
Multicoated to minimise reflection at the filter surfaces which reduces flare and ghosting.
** 81 SERIES CONVERSION FACTORS **
81A decreases colour temperature from 3400 - 3200 degrees Kelvin
81B decreases colour temperature from 3500 - 3200 degrees Kelvin
81C decreases colour temperature from 3600 - 3200 degrees Kelvin
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