Baader Planetarium T-2 Star Diagonal
Best modular prism for dedicated amateur astronomers seeking optical precision.
A highly modular prism diagonal that prioritizes contrast and compact geometry over convenience. It is the ideal choice for users building a custom optical train who need to save back-focus distance without sacrificing image quality.
$181.00
at
Agena AstroProducts
More T-2 options
Who it's for
- Astrophotographers needing rigid, customizable equipment configurations
- Visual observers seeking high-contrast views of planets and stars
- Users of binoviewers or telescopes with tight focus tolerances
Who should skip it
- Budget-conscious hobbyists looking for an all-in-one out-of-the-box solution
- Deep-sky observers using large-format eyepieces for maximum field of view
- Beginners who prefer simple, standardized plug-and-play accessories
Performance breakdown
Optical Clarity
High-grade glass prism delivers exceptional contrast for planetary and double-star viewing.
Back-Focus Efficiency
Short optical path length solves common spacing issues in compact telescope systems.
Build Quality
Precision-machined aluminum housing offers robust durability for long-term field use.
System Versatility
Modular T-2 threading allows seamless integration with a wide range of accessories.
Light Transmission
Multi-coated surfaces ensure minimal light loss during critical high-magnification observation sessions.
Portability
Lightweight and compact footprint makes it an ideal travel-friendly optical upgrade.
Key Specs
Material
Aluminum housing with optical-grade glass prism
Clear Aperture
32mm
Optical Path Length
35mm
Weight
130g (4.6 oz)
Mount Interface
T-2 Thread
Compatibility
Schmidt-Cassegrain, Maksutov-Cassegrain, and refractors (f/7 or longer)
Coating
Multi-coated
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