ZWO Narrowband Filter Set with 1.25" OIII, SII, and H-Alpha Filters
These ZWO 1.25" filters are mounted in a metal cell and come in a plastic storage box. ZWO narrowband filters are fine-optically polished to reach an accuracy of 1/4 wave, and they are capable of light transmission up to 80%. Their performance is further enhanced by multiple layers of anti-reflection coatings.
ZWO 1.25" Mounted OIII Filter
OIII, or doubly ionized oxygen, emits light in the blue/green, or teal portion of the spectrum near 500 nm. Planetary nebulae and supernova remnants emit most of their light in the OIII line.
ZWO 1.25" Mounted Ha Filter
Hydrogen-Alpha is the most dominant emission line in star-forming regions. H-Alpha light is created by atomic hydrogen, and is responsible for the red color seen in most nebulae. The Ha portion of the spectrum is at 656 nm.
ZWO 1.25" Mounted SII Filter
Sulfur is in the deep red of the spectrum near 672 nm. When combined with H-a and OIII, these three filters will produce images with colors that are reminiscent of those taken by the Hubble Space Telescope.
- ZWO 1.25" Round Mounted H-Alpha Filter
- ZWO 1.25" Round Mounted SII Filter
- ZWO 1.25" Round Mounted OIII Filter
- 3x Plastic Filter Cases
Dimensions & Specifications
- Filter Size: 1.25" (31.75mm)
- Filter Type: Narrowband Imaging
- Filter Shape: Round
- Mounted/Unmounted: Mounted
- Filter Set Contents: Ha; OIII; SII
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Return & Exchange Policy
At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.
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