Specifications

Items	PF1	PF2	PF4	ICF1
Diameter Available (mm)	27, 30, 30.5, 37, 43, 46, 49, 52	27, 30, 30.5, 37, 43, 46, 49, 52	27, 30.5, 37, 43, 46, 49, 52	27, 30.5, 37, 43, 46, 49, 52,
Filter Threads	Both female & male	Both female & male	Both female & male	Both female & male
Transmittance Curves	ĄĄ			Transmittance (average) = 90% at 420nm-610nm Transmittance < 5% at 670nm-1000nm
Glass composition	Polished Crystal Material			Float Glass

The ICF1;

The KAYA ICF1 is an Infrared-Cut Filter. It is of the highest optical quality and attaches externally, performing the exact opposite function to the PF. I.e.. it prevents NIR from passing through, but allows visible light to pass.

It can be used either to block NIR escaping from a light source (such as a flash unit, to take "Fluoresced See-Through" images) or in front of a camera lens (to prevent NIR affecting the colour tones in an image when the camera's own internal IR Cut Filter has been removed).

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