Baader Planetarium T-2 Star Diagonal

Prism diagonals, like this Baader model, are generally superior for high-contrast planetary and double-star observation. They minimize light scatter and wavefront error more effectively than many standard mirror diagonals, resulting in a cleaner, sharper image.

This unit is optimized for compound telescopes (Schmidt-Cassegrain and Maksutov-Cassegrain) and refractors with a focal ratio of f/7 or longer. It is not recommended for fast refractors (f/6 or shorter) as the prism can introduce spherical aberration.

It means the diagonal isn't a fixed, single-purpose unit. Because it uses standard T-2 threads, you can attach various adapters to customize your setup, such as connecting specific cameras, binoviewers, or different eyepiece holders, rather than being locked into a single configuration.

Yes, this is an excellent choice for systems with tight back-focus. With an optical path length of only 35mm, it is much more compact than standard 2-inch diagonals, helping you reach focus on telescopes that struggle with longer accessories.

The 32mm clear aperture is designed to be sufficient for most 1.25-inch eyepieces. You will not experience vignetting with standard 1.25-inch oculars, though it is not intended for use with wide-field 2-inch eyepieces.