ZWO D32 AR Protective Window
ZWO 32 mm AR Window
This D32 AR window from ZWO protects your camera's sensor from dust and humidity. The window, which is a 32 mm round AR filter, is designed for the ASI1600, ASI294 and ASI183 series astronomy cameras. It is 2 mm thick and has a flatness specification of 1/4 wavelength.