HERE ARE MIDWEST OPTICAL MIDOPT BP450-25.4 C-MOUNT, BP450-27, BP450-35.5, BP450-37.5 (CAN MOUNT IN A 37MM MOUNT IF DESIRED), BP450-40.5 INDIGO BANDPASS FILTERS. PLEASE LET ME KNOW IF THERE IS A SPECIFIC SIZE OR QUANTITY YOU'RE LOOKING FOR, I JUST MIGHT HAVE IT.
FILTER SIZE: M25.4 C-MOUNT, M27, M35.5, M37.5, M40.5
SPECTRAL RANGE: 425-470nm
FWHM: 60nm
TOLERANCE: +/- 10 nm
MIN. PEAK TRANSMISSION: >90%
SURFACE QUALITY: 60/40
https://midopt.com/filters/bp450/
PLEASE SEE MY OTHER AUCTIONS FOR MORE GREAT DEALS!