Highlights
- T-2 BBHS star diagonal without T-2 outer threads. Provides greatest reflectance over most spectral range from 390 to 2000nm
- Much higher in brilliance than cheap dielectric coatings
- BBHS = Broadband Hardsilver coating with dielectric protective overcoating
- T-2 BBHS-Sitall zenith mirrors on both sides with T-2 Photo thread
