Amici prism 45° 1.25″ is a diagonal prism that not only flips your telescope image, but also corrects it so you get a true-to-life upright and left-right correct image. That makes this accessory ideal for daytime bird watching, following ships at sea or viewing landscapes in detail.
Where a standard star diagonal sets the image straight but leaves it mirrored, an Amici prism provides the correct orientation. Thanks to the 45° viewing angle, you'll view comfortably without straining your neck. The connection is 1.25″, so the prism fits virtually all common refractors, Maksutovs and Schmidt-Cassegrains.
For astronomical use at high magnifications, an Amici prism is less suitable because the prism edge can sometimes cause diffraction spikes on bright stars. For lunar and planetary observations, it is better to use a regular star diagonal. But for terrestrial applications, this prism actually provides the most natural viewing experience.
Application
Use this Amici prism mainly for nature observation, bird watching and navigation. For stargazing, you can use it at low magnifications, for example to view the moon or star fields with an upright view. For serious deep-sky and planetary observations, a standard diagonal remains the better choice.
Specifications
- Type: Amici prism
- Viewing angle: 45°
- Barrel size: 1.25″
- Image orientation: upright, left-right correct
- Suitable for: refractors, Maksutovs, Schmidt-Cassegrains





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