Chroma Jovian Methane Filter

This filter isolates the 889nm wavelength, which is strongly absorbed by methane in Jupiter's atmosphere. By blocking other light, it highlights high-altitude cloud features and atmospheric structures that are otherwise washed out in standard visible-light imaging.

The 36mm size is designed for standard filter wheels or drawers. It is specifically optimized for Schmidt-Cassegrain and Maksutov-Cassegrain telescopes, and it is parfocal for systems operating at f/4.0 or slower, meaning you won't need to refocus when switching filters.

Yes, an 18nm Full Width at Half Maximum (FWHM) is a standard, effective width for methane imaging. It strikes a balance between isolating the specific methane absorption band and allowing enough light transmission to keep exposure times manageable.

While the housing is durable, the optical performance relies on the precision manufacturing standards. With a transmitted wavefront better than 0.25 waves/inch and parallelism under 30 arcsec, this filter is built to maintain image sharpness without introducing distortion.

You need a camera that is sensitive to near-infrared light, specifically around 889nm. Most dedicated monochrome astronomy cameras have sufficient sensitivity in this range, but you should verify your camera's spectral response curve before purchasing.