A specialized 20 nm full width half-height (FWHM) methane ( _CH4 ) line filter designed for astrophotography of gaseous planets, especially Jupiter and Saturn.

The filter works with infrared-sensitive cameras – both monochrome and color – and allows for clear exposure of structures on the planets' disks while maintaining good light transmission.

Filter size: 1.25".

TESTS
/ below: session 24-25.11.2020, Moon, RC 10, ZWO ASI 462, CH4 (methane) /