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Astronomik Filter CLS CCD Sony Alpha Clip
UV/IR cut that lets HAlpha through, if you don;t know what this, you definately don’t need it.
Bought it to convert a full spctrum A7iii to an astro mod, then inherited a canon EOS Ra, this filter was used once.
Ful spec:
https://www.astronomik.com/en/clip-filter/clip-filter-fur-sony-alpha-7r-7s.html
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Category: Cameras and Photography:Telescopes and Binoculars:Telescope Parts and Accessories:Filters
Location: Portland