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SII Filters

 
 

If you are just starting in the exciting world of narrowband imaging and are looking for a high-quality filter that won't empty your wallet, take a look at Astronomik’s highly popular SII 12 nm CCD Filter - 1.25" - SII-1! Made in Germany and providing up to 99% transmission, this filter blocks unwanted wavelengths in the visible and IR parts of the spectrum, and with multi-layer coatings to protect it from the impacts of scratching, aging, and high humidity, you can expect both long life and incredible performance!

Providing incredible contrast and no annoying ghosting, Astronomik’s MaxFR SII 6 nm CCD 1.25" filter is designed to work perfectly with fast optical systems such as Celestron’s RASA and the Epsilon Astrographs made by Takahashi. This highly selective 6nm filter is an excellent choice under heavy light pollution when imaging super faint objects that require maximum contrast.