Datasheet

21


This  lter blocks visible light (up to
800 mm) almost completely. It is
dark red, almost black. With analog
IR  lm or IR-sensitive digital cam-
eras it delivers a fantastic wood
effect (white leaves) and a typically
dark sky. The exposure values vary
according to the digital camera
model being used and are best deter-
mined by experimenting. They are
usually in the range of a few seconds.
Focusing is performed  rst without a
 lter using IR focus correction.


This  lter has a steep cut-off effect
for unwanted ultraviolet and infrared
light. In digital cameras and camcord-
ers without full  ltering in front of the
image sensor it prevents color casts
and unsharpness. The brilliance and
sharpness of the images are increased.
This takes place by interference
between vacuum-deposited layers
and not by absorption via colored glass.
This principle is ideal for angles of
view up to 60° or smaller. The  lter
has no exposure factor.