Caption: The passbands (AKA transmission functions) normalized to 1 for UBVRI filters of photometry. The UBVRI filters are most traditional set of passbands, but there are many other sets. It seems every time someone builds a new advanced telescope, they ...
Now available: New Baader UBVRI and SLOAN/SDSS (ugriz') Photometric Filters / Baader Planetarium Blog Posts
Optolong Filters UBVRI set photometric 2''
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Baader - Set of 5 Photometric UBVRI Filters 1.25" (4mm Glass Thickness, Optically Polished) | Telescopes
Baader UBVRI Photometrics filter set (5 filters) – Lunático Astronomía