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ZWO CH4 filter: FWHM=20nm 90% pass


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ZWO CH4 filter: FWHM=20nm 90% pass
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Availability: In stock



The ZWO CH4 filter: FWHM=20nm 90% pass is an ideal solution for those wishing to image planetary targets - particularly the Gas Giants - on the Methane Band. This filter, when paired with cameras with good near-Infra Red response - notably those the IMX185 and IMX224 Sony Exmor chips: the ZWO ASI185 and ASI224s - will reveal significant detail.

This filter has a pretty narrow bandwidth, so really comes into its own when used with telescopes with apertures 8-inch / 203mm and above. As an imaging filter teh ZWO CH4 is extremely useful - though forget about using it visually, as the human eye just isn't sensitive enough to this part of the spectrum to make use of it.

Comes in a tough plastic storage case.

Bandwidth (FWHM): 20nm (see transmission curve is images)
Transmission: 90%
Compatibility (size): 1.25"

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