Baader Planetarium 2458105 90° Amici Prism Diagonal with T-2 Thread, 32mm Clear Aperture

Terrestrial observation through a telescope often presents an upside-down or mirrored image, making it difficult to identify landmarks or follow moving subjects. The Baader Planetarium 2458105 90° Amici Prism Diagonal solves this by delivering a correctly oriented, non-mirrored view, so you see the world exactly as your eyes do. Whether you're birdwatching, surveying landscapes, or enjoying daytime nature viewing, this prism ensures a natural and comfortable experience.

Who is it for

This diagonal is ideal for amateur astronomers and nature enthusiasts who use refractors, Schmidt-Cassegrains, or Maksutov telescopes for terrestrial viewing. It's also a valuable addition for anyone who wants a high-quality erect-image solution without compromising optical performance. If you already own T-2 system accessories, this prism integrates seamlessly into your setup.

Main features

• 90° Amici prism design for erect, correctly oriented images
• Generous 32 mm clear aperture for full illumination of wide-field eyepieces
• Baader Phantom Group™ multi-coatings for maximum light transmission and contrast
• Precision T-2 (M42x0.75) female input and male output threads for versatile connectivity
• Black anodized aluminum housing with internal anti-reflection baffling
• Compact light path of approximately 60 mm, ideal for systems with limited back focus
• Includes dust caps to protect optical surfaces when not in use

Specifications

• Prism type: Amici (90°)
• Clear aperture: 32 mm
• Image orientation: Erect, non-mirrored
• Input connection: T-2 (M42x0.75) female thread
• Output connection: T-2 (M42x0.75) male thread
• Optical coatings: Baader Phantom Group™ multi-coatings
• Housing material: Black anodized aluminum
• Light path length: Approximately 60 mm
• Compatibility: Baader T-2 System, refractors, SCTs, Maksutovs (with T-2 adapters)
• Primary application: Terrestrial observation, daytime viewing
• Optical quality: High-precision, diffraction-limited
• Internal features: Anti-reflection baffling
• Included accessories: Dust caps
• Thread standard: M42x0.75 (T-2)
• Optical elements: 3-element prism system

Tips

To achieve the best results, pair this diagonal with high-quality eyepieces that have a field stop diameter up to 32 mm. For telescopes with limited back focus, the 60 mm light path helps maintain focus without additional extensions. When not in use, always replace the dust caps to keep the prism surfaces clean and free from debris.