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List of infrared block filters (IR-Block / IR-Cut) available in several cells and formats.
Celestron Skyris IR-block filter mounted in C-threaded cell. Clear aperture 19.5 mm.
Astronomik IR-Block Filter mounted in T-threaded cell (M42x0,75) for using with T-threaded accessories.
Astronomik IR-Block Filter mounted in SC threaded cell for using with Schmidt-Cassegrain telescopes.
Astronomik IR-Block Filter mounted in 1.25" / 31.8 mm threaded cell for 1.25" / 31.8 mm accessories. Filter diameter 28.5 mm.
Astronomik IR-Block Filter mounted in 2" / 50.8 mm threaded cell for 2" / 50.8 mm accessories. Filter diameter 48 mm.