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B+W 49mm 81A

This conversion filter has an effect similar to that of Kodak Wratten 81A gelatine filter. Its strength of 18 Mired makes it approximately similar to the KR 1.5 conversion filter, except that it is less reddish as it absorbs a little bit red. It can be used like the KR 1.5 filter, especially with films that tend to a reddish rendition inherent to their emulsion or to the developing process. The 81A conversion filter is also ideal for landscape photographs at noontime and for flash exposures on daylight reversal film when the light emitted by a compact flash unit has too high a color temperature (and thus an excessive blue component). Its filter factor is approximately 1.2.
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