Hoya Y0667 Datasheet download pdf (Page 56)

Eliminates undesirable reflections

POL-CONVERSION

Without Filter

A linear polarizing sheet is sandwiched between one transparent

optical glass and one color conversion filter (85B). Enables tungsten

film to be used in daylight and also has the effect of a regular

polarizing filter. Eliminates undesirable reflections from water,

windows and non-metallic surfaces. Also serves to darken the sky

as well as increasing color saturation in general. Mounted in a

rotating frame.

(R72,RM90)

INFRARED

Used for photography with infrared film. Infrared film is also sensitive

to ultraviolet rays and the shorter wavelengths of the visible

spectrum so it is necessary to filter out all but the infrared rays. R72

passes only infrared rays above 720nm; RM90 passes only that

above 900nm. Often used in crime detection, medical photography,

detection of distribution of vegetation, etc. In ordinary photography

with infrared film or infrared color film, the Y (K2), O(G), R(25A) and

other filters can also be used to change the contrast or color effect.

SPECIAL EFFECTS FILTERSfor Film & Digital

With R72

With RM90

Without Filter

With POL-CONVERSION

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Hoya Y0667 Datasheet Page 56