Astronomik 1.25" IR blocking filter

Astronomik IR-Block 1.25" — infrared-blocking filter for lunar and planetary imaging

The Astronomik IR-Block filter is Astronomik's standard filter for lunar and planetary imaging with infrared-sensitive cameras. It blocks infrared light while preserving the visible spectrum.

No more IR ghosting

Telescopes corrected for visible light often focus infrared at a slightly different point, which adds a blurred ghost image to the sharp one. Many planetary cameras are sensitive to infrared, so blocking it removes halos and gives a sharper overall image. The filter works at all focal ratios.

Dust protection

Placed in front of the camera, the filter also protects the telescope and camera from dust and airborne contaminants. For visual observing, Astronomik considers it useful only as dust protection.

Optical

Physical

Manufacturer documentation

Astronomik IR-Block 1.25" product page

Compatibility notes

IR-Block (10230125), not the L-1/L-2/L-3 UV-IR Block luminance filters. Cut-off wavelength not published on the product page.