Diagonals
Diagonals allow comfortable viewing day and night with prism, dielectric and amici types in 2" and 1.25"
Telescope diagonals for astronomical observation with a 90 degree angle for comfort, available with prisms or mirrors in 1.25 and 2 inch sizes. Suitable for Refractors and Catadioptrics but not for Newtonian Reflectors.
Diagonals for daytime with telescopes correcting the image for observing terrestrially, these are designed for Refractors or Catadiotrics, not suitable for Newtonian reflectors.