HERE ARE MIDWEST OPTICAL MIDOPT BP500-25.4 C-MOUNT, BP500-25.5, BP500-40.5, BP500-49, BP500-55 GREEN-BLUE BANDPASS FILTERS. OPEN BOX NEVER BEEN USED. I HAVE SOME SMALLER SIZES IF NEEDED, JUST ASK.
TYPE: GREEN-BLUE BANDPASS
FILTER SIZE: M25.4, M25.5, M40.5, M49 & M55
SPECTRAL RANGE: 440-555nm
FWHM: 248nm
TOLERANCE: +/- 10 nm
MIN. PEAK TRANSMISSION: >85%
SURFACE QUALITY: 60/40
https://midopt.com/filters/bp500/