The ZWO IR Pass 850 nm filter is a bandpass filter that transmits infrared radiation with a wavelength above 850 nm. It is used with IR-sensitive cameras, especially in planetary astrophotography and infrared imaging in difficult seeing conditions. Thanks to this filter, it is possible to record high-contrast images, especially with monochrome cameras, but also with color cameras - without the need for debayering, because the sensitivity of sensors above 850 nm is the same for all subpixels.

Technical parameters

• type: IR Pass band filter >850 nm
• cut-off wavelength: 850 nm
• housing: 1.25" (external thread M28.5×0.6)
• Active diameter: 26 mm
• glass thickness: 1.9–2.0 mm
• substrate: optical glass

TESTS
/ below: session 24-25.11.2020, Moon, GSO RC 10, ZWO ASI 462, ZWO IR-850 (IR-pass) /