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Baader 90° Astro-Grade Amici Prism w/ BBHS Coating - T-2
Baader 90° Astro-Grade Amici Prism w/ BBHS Coating - T-2
Baader 90° Astro-Grade Amici Prism w/ BBHS Coating - T-2
Baader 90° Astro-Grade Amici Prism w/ BBHS Coating - T-2
Baader 90° Astro-Grade Amici Prism w/ BBHS Coating - T-2
Baader 90° Astro-Grade Amici Prism w/ BBHS Coating - T-2
Baader 90° Astro-Grade Amici Prism w/ BBHS Coating - T-2

Baader 90° Astro-Grade Amici Prism w/ BBHS Coating - T-2

by Baader Planetarium
SKU BAA-2456130
CA$430.00 - CA$430.00
CA$430.00
CA$430.00 - CA$430.00
CA$430.00
Price Match Policy!
  • 90° comfortable viewing angle
  • Amici prism design provides correctly oriented, erect images
  • Features a full 1.25" clear aperture to prevent vignetting
  • Baader BBHS® coatings for maximum image brightness and contrast
  • Dual T-2 (M42x0.75) threads for direct, secure connections
  • Solid metal body ensures precise optical alignment
1 in stock
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Baader 90° Astro-Grade Amici Prism w/ BBHS Coating - T-2

    The Baader 90° Astro-Grade Amici Prism delivers correctly oriented, right-side-up images through a full 1.25-inch clear aperture, making it an essential tool for high-power terrestrial, nature, and white-light solar observing where intuitive image orientation is critical.

    90° Correct-Image Views with a Full 1.25" Aperture

    Unlike a standard star diagonal that corrects the image up-down but leaves it reversed left-right, an Amici prism provides a fully correct, erect image. This makes navigating a landscape or tracking a moving target feel completely natural. Baader's "Astro-Grade" designation signifies this prism is manufactured to a higher optical standard than typical terrestrial prisms, ensuring sharp, detailed views worthy of a high-quality telescope. Its full 1.25" clear aperture guarantees that even your widest-field 1.25" eyepieces are fully illuminated without vignetting.

    BBHS® Coatings for High-Contrast Terrestrial and Solar Observing

    This prism features Baader's proprietary BBHS® (Broadband Hard-Coated Silver) coatings. This advanced silver coating provides exceptionally high reflectivity across the visual spectrum, resulting in a noticeably brighter and higher-contrast image compared to prisms with standard aluminum coatings. The entire optical element is housed in a solid metal body, which maintains perfect alignment and ensures a lifetime of reliable use in the field.

    Dual T-2 Threads: An Ultra-Short, Adaptable Prism Body

    Engineered for maximum adaptability, this Amici prism features T-2 (M42x0.75) threads on both the telescope and eyepiece sides. This allows for a direct, secure, and flexure-free connection within the extensive Baader T-2 Astro-System. The "extremely short" body design minimizes the optical path length, making it easier to reach focus in a wide variety of telescopes and accessory configurations, from spotting scopes to refractors.

  • What is the primary use for the Baader T-2 Amici Prism?

    The Baader 90° Amici Prism is designed for applications where a fully corrected, non-reversed image is essential. This makes it ideal for terrestrial and nature observing, as well as for white-light solar viewing with an appropriate main-objective filter. The correct image orientation allows for intuitive panning and tracking of moving objects.

    Is the Baader Amici Prism suitable for astronomical deep-sky imaging or observing?

    While it can be used, it's not the optimal choice for critical deep-sky observing. Amici prisms inherently have a very faint dividing line (the "roof edge") that can be visible on bright stars or extended objects at high magnification. For astronomical use, a high-quality mirror or standard prism diagonal like the Baader T-2 Zeiss Prism Diagonal will provide a slightly higher-contrast view without this artifact.

    How do the T-2 threads on the Baader Amici Prism work?

    The T-2 threads (M42x0.75) on both sides of the prism body allow it to be integrated directly into a modular system of accessories. You can thread on T-2 to 1.25" eyepiece holders, camera adapters, or extension tubes for a rigid, secure connection that avoids the potential for tilt or slop from traditional slip-fit accessories.

    What makes the BBHS® coating on this Baader prism special?

    BBHS® stands for Broadband Hard-Coated Silver. Unlike standard aluminum coatings, this advanced silver coating provides very high, uniform reflectivity across the entire visual spectrum. This results in a brighter image with more neutral color balance and enhanced contrast, which is especially beneficial for discerning subtle details during daytime observing.

    Can I use the Baader 90° Amici Prism for daytime birdwatching with my apochromatic refractor?

    Absolutely. This is a perfect application for this prism. Pairing it with a high-quality refractor turns your astronomy telescope into a world-class spotting scope. The "Astro-Grade" optics will preserve the sharpness of your telescope, and the correct image orientation makes following birds in flight effortless.

    Will the Baader Amici Prism's 1.25" aperture cause vignetting with my Tele Vue 24mm Panoptic eyepiece?

    No. The Baader Amici Prism is designed with a "full 1.25" aperture," meaning it has a clear opening large enough to illuminate the maximum field stop of the 1.25" format. The 24mm Panoptic, which has one of the largest field stops available in a 1.25" eyepiece, will be fully illuminated without any dimming at the edges of the field.

  • Prism Type 90° Astro-Grade Amici Prism
    Image Orientation Erect, non-reversed
    Clear Aperture 1.25"
    Coatings Baader BBHS® (Broadband Hard-Coated Silver)
    Body Construction Solid Metal
    Telescope Connection T-2 (M42x0.75) Female Thread
    Eyepiece Connection T-2 (M42x0.75) Female Thread
    Net weight (kg) 0.25
    Prism Glass (Type) BaK-4
    AR-Coating Phantom Coating® Group
    Clamping System no clamp
    Inner Diameter / Clear Aperture (mm) 31
    Optical length (mm) 47.5
    Inner Connection (eyepiece/-camera-sided) M34
    Optical Design Erecting Prism
    Reflection surface Sealed BBHS coating
    Glas path 50 mm

    This product consists of the prism body only. Eyepiece holders and telescope adapters are sold separately.

  • Baader Planetarium Warranty