Baader Planetarium Amici Erecting Prism

A standard star diagonal produces a mirror-reversed image, which is fine for astronomy but disorienting for terrestrial viewing. The Amici prism corrects this, providing an upright, non-reversed image that makes spotting birds, wildlife, or distant landscapes intuitive.

This unit is designed for telescopes with a 2-inch SCT thread connection. If your telescope uses a standard 2-inch focuser drawtube rather than an SCT thread, you may need an additional adapter to secure it properly.

Yes. The prism includes a reducer adapter that allows you to switch seamlessly between 2-inch and 1.25-inch eyepieces, giving you flexibility for different magnification needs.

While the 45-degree angle is ideal for terrestrial viewing, it can be uncomfortable for looking at objects near the zenith (directly overhead). For pure astronomy, a 90-degree diagonal is generally more ergonomic.

Because it uses a prism rather than a mirror, there is a slight potential for diffraction spikes on very bright stars. However, for terrestrial observation, the multi-coated optics maintain excellent contrast and brightness, making the trade-off negligible for daytime use.