Baader Erecting Prism Star Diagonal

Yes. It comes with a dedicated adapter that allows you to use your 1.25-inch eyepieces alongside your 2-inch accessories.

This is specifically designed for terrestrial viewing. Because it uses an erecting prism, it provides an upright, correctly oriented image, whereas standard astronomical diagonals will show your view flipped or mirrored.

The 90-degree angle is generally comfortable for most viewing positions, but keep in mind that it is designed for a specific posture. If you are looking at objects very low on the horizon, you may find a 45-degree diagonal more ergonomic, though this 90-degree model is excellent for general-purpose terrestrial observation.

It is compatible with any telescope that accepts a standard 2-inch barrel. Just ensure your telescope has enough back-focus travel to accommodate the length of the diagonal, as erecting prisms can sometimes require more focus travel than standard mirror diagonals.

Prism diagonals like this one are excellent for terrestrial use because they provide the necessary image correction. While some high-end mirror diagonals are preferred for pure deep-sky astronomy, this prism is specifically engineered to maintain clarity and contrast for daytime viewing.