Baader T-2 BBHS Mirror Diagonal T-2 BBHS star diagonal withT-2 threads for compatibility with all Baader's Astro T2 system of parts Provides high reflectance over a wide spectral range from 390 to 2000nm to give high color fidelity Higher in brilliance and lower scatter than cheaper dielectric coatings BBHS = BroadBand HardSilver coating with dielectric protective overcoating Sitall glass-ceramic zero expansion mirror won't lose its flatness even during extreme temperature changes Technical Specifications MANUFACTURER Baader Planetarium SKU (#) 2456103 OPTICAL DESIGN Mirror Diagonal OUTER CONNECTION (LENS SIDED) Thread, T-2 (M42 x 0,75) INNER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, T-2 (M42 x 0,75) REFLECTION SURFACE BBHS coated, Dielectrically protected IMAGE ORIENTATION Erect image, Mirror inverted OPTICAL LENGTH (MM) 43 CLAMPING SYSTEM no clamp DEFLECTION ANGLE 90° INNER DIAMETER / CLEAR APERTURE (MM) 33 In the Box Baader T-2 BBHS Mirror Diagonal Warranty & Manuals 2-Year Warranty