HERE ARE MIDWEST OPTICAL MIDOPT BN850-25.4 C-MOUNT, BN850-25.5, BN850-27, BN850-30.5, BN850-34, BN850-35.5, BN850-40.5, BN850-43 NARROW NEAR-IR BANDPASS FILTERS. NEVER BEEN USED. LET ME KNOW IF YOU'RE INTERESTED IN A SIZE SMALLER THAN A 27MM, I JUST MIGHT HAVE IT.
FILTER SIZE: M25.5, M27, M30.5, M34, M35.5, M40.5, M43
SPECTRAL RANGE: 840-865nm
FWHM: 52nm
TOLERANCE: +/- 07nm
MIN. PEAK TRANSMISSION: >85%
SURFACE QUALITY: 60/40
https://midopt.com/filters/bn850/
PLEASE SEE MY OTHER AUCTIONS FOR MORE GREAT DEALS!
LET ME KNOW IF THERE IS A SIZE, QUANTITY OR SOMETHING SPECIFIC YOU ARE LOOKING FOR, MAYBE I HAVE IT?