The Chroma OIII 5nm Filter isolates the 500.7nm primary emission line of doubly ionized oxygen, which is the second most important imaging line after Ha.
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This product has multiple variants. The options may be chosen on the product page
Baader Solar Continuum Filter, a unique filter, transmitting a narrow 10nm bandpass around the 540nm region. The double stacked version is supplied with 20 x 29cm sheet of ND3.8 AstroSolar Photo Film.
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This product has multiple variants. The options may be chosen on the product page
The STC Astro Multispectra filter is a light pollution suppression filter mainly designed for imaging BroadBand objects like Galaxies and Clusters, which also enhances Nebulae with good colour balance.
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This product has multiple variants. The options may be chosen on the product page
The Chroma SII 5nm Filter is essential for imaging objects rich in ionised Sulphur in light polluted areas and in moonlit conditions. Partners well with the Chroma 5nm Ha and OIII filters.
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This product has multiple variants. The options may be chosen on the product page
The Astronomik H-alpha 12nm CCD Clip-Filter EOS R XL is suitable for imaging of Hydrogen nebulae from sites with light pollution and from dark sites too