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X-Nite Filters are precision made, quality filters. Listed are various specifications.
Infrared Filters (Infrared Pass / Visual Light Blocking)
Infrared Blocking / Visual Light Pass Filter
Ultraviolet Pass / Visual Light Blocking Filter
330nm Filter Bandpass BP1 Filter
Infrared Color Band Pass Series
CCD and CMOS image sensors only see black and white. In order for the camera to see color, small color filters are printed on top of the image sensors. These filters are typically arranged in a Bayer pattern.
Below is the typical response curve for CCD and CMOS image sensors. The top dark blue channel shows the quantum efficiency of an unfiltered image sensor. The Red, Green and Blue traces show the transmission response after the light passes through the mosaic color filter over the image sensors.
When we convert a camera to see IR+Visible or IR-Only, the majority of the infrared data will come in on the red channel. Interestingly, the blue and green channels will see some infrared but will be much lower than the red channel.
Other Glass Equivalents:
Kaya PF4 is 780nm
Hoya RM72 is 720nm
M&K #093 is 830nm
M&K #095 is 850nm
M&K 1000 is 1000nm
Wratten 18A is 350nm
Heliopan filters use Schott glass indicated by the RG number. For example, RG830 = 830nm and RG1000=1000nm.
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