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Blue Bandpass Filter 40.5 Mm Diameter (FLTB470-40.5)
https://www.branom.com/shop/808884-blue-bandpass-filter-40-5-mm-diameter-fltb470-40-5-201885
https://www.branom.com/web/image/product.template/201885/image_1920?unique=89cf136
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Features:
Blue Bandpass Filter 40.5 mm diameter; 425-495 nm useful range- Lens Type: C-Mount
- Filtered Light: Blue
- Diameter: 40.5 mm