ZWO New narrowband 36mm filter - 36mm SII 7nm

ZWO New Narrowband 36mm filter

ZWO 36mm Narrowband Filters – Ha, SII, OIII for Deep Sky Imaging

The ZWO New Narrowband 36mm Filter Set is specially designed for high-contrast imaging of emission nebulae, even under heavily light-polluted skies or with the Moon up. Each filter features a 7nm bandpass, finely polished optics, and high transmission at the critical wavelengths for H-alpha (656nm), SII (672nm), and OIII (500nm) lines.

Filter Highlights

• ZWO H-alpha 7nm Filter

  • Bandpass: 7nm at 656nm

  • Transmission: ~90%

  • Enhances fine structure in nebulae

  • Ideal for blending with RGB to enhance detail while preserving natural tones

• ZWO SII 7nm Filter

  • Bandpass: 7nm at 672nm

  • Transmission: ~90%

  • Reveals details in planetary nebulae, supernova remnants

  • Best used with Ha and OIII in a SHO configuration for tricolor imaging

• ZWO OIII 7nm Filter

  • Bandpass: 7nm at 500nm

  • Transmission: ~90%

  • Excellent for bringing out oxygen-rich regions in emission nebulae

  • Ideal for capturing a “Hubble palette” style image with the SHO set

Technical Specifications

• Product Name: ZWO New Narrowband 36mm Filter

• Diameter: 36mm

• Thickness: 2mm

SHO Narrowband Imaging & Hubble Palette

You can recreate the iconic Hubble-style images (like the "Pillars of Creation" in M16) by combining:

• H-alpha Filter

• OIII Filter

• SII Filter

With this SHO filter set, you can continue imaging even during full moon nights or in urban environments, keeping your astrophotography gear active year-round.

➤ Many imagers start with the H-alpha filter as their first narrowband addition to an LRGB set. It adds structural detail while preserving natural color balance.

Transmission Curve