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Baader OIII 8.5mm filter

Space Oddities
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Space Oddities

Space Oddities

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Does anyone know if Baader manufactures a 31mm unmounted version of their OIII 8.5nm filter?

The only filter I could find in this class and size is the Ha 7nm, but for some reasons, if I want a 31mm OIII filter, that size isn't available. Same with SII. There seems to be only the ultra-narrowband and the f/2 highspeed versions available in this size 🤔

I tried a few retailers, and couldn't find it either...

Thanks :) 

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