28mm Secondary flat mirror (DIAGONAL) are optically flat yield optimum performances when combined with above astronomical mirrors. Each mirror is aluminized and overcoated.
TEJRAJ AND CO offers secondary flat telescope mirrors to match the complete telescope set request. Our elliptic flat mirror has the same high optical quality as our primary mirrors. All of the mirror surface quality is over 1/4th wave RMS at the least, typically better.
All mirrors have a highly reflective aluminum coating.