IR 850nm Pass Filter is suitable for IR sensitive cameras.
 
ZWO 1.25″ IR 850nm Pass Filter suitable for IR sensitive cameras. You don’t need to debayer and get the full resolution of this sensor when use it with a Color camera such like ASI224MC or ASI185MC. Because the QE responce  of sensor beyond 850nm  is all the same. So you can use a color camera as mono camera with this filter, just don’t forget to keep the WB_R and WB_B to 50 (no White Balance applied).
 
To see the unseen: ASI290MM+850nm IR filter + 2.1mm lens.
 
Thickness: 1.9-2mm
 
The transmission properties of the IR 850nm Pass Filter are optimized for CCD astrophotography.