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Review Summary
Color 36mm Round
The Baader UV-IR Cut Filter has an unmatched 98% Average Transmission! Freedom from ghost images (very low reflection multi-coating, Striae-free, and plane-parallel substrate).
Extremely Sharp Cutoff at 690nm (leaves all the visible red, including the important 656nm H-alpha emission line).
The Baader Planetarium UV-IR Cut Filter has a sharp cutoff below 400nm. Eliminates violet halos around bright stars (more effectively than simpler so-called Minus Violet photographic filters).
These Color 36mm Round Optical Filters work with STF and STT filter wheels including FW5-8300, FW8-8300, FW8S-STT, and FW8G-STT. The smaller 1.25" filters may be used with KAF-0402, KAF-1603, and KAF-3200 sensors, or with larger sensors at f/7 or above.