ZWO H-Alpha SII OIII filter set 36 mm separate filters

ZWO H-alpha, SII and OIII filter set 36 mm: narrowband for large sensors

This set of three unmounted 36 mm narrowband filters captures the emission lines of hydrogen (H-alpha, 656 nm), sulfur (SII, 672 nm), and oxygen (OIII, 501 nm) with a full width at half maximum (FWHM) of 7 nm. Light pollution and moonlight are virtually completely suppressed, making faint structures in HII regions, supernova remnants, and planetary nebulae visible with high contrast.

The 36 mm format prevents vignetting with cameras featuring larger sensors, such as the ASI294MM and ASI2600MM series. The filters are parfocal with the ZWO LRGB sets, so you can change channels without refocusing.

Features

• Three narrow-band filters with 7 nm full width at half maximum
• 36 mm format: no vignetting on large single sensors
• Parfocal with ZWO LRGB filters: no refocusing
• Suppresses light pollution and moonlight almost completely

Compatibility

Fits filter wheels with 36 mm slots, such as the ZWO EFW 7x36mm. Designed for monochrome ZWO ASI cameras with large sensors.

Specifications

The 36 mm narrowband set from the filter series of ZWO. Combine with the 36 mm LRGB set in an EFW 7x36mm for the complete seven-channel palette.