Baader T-2 Stardiagonal (Zeiss) Prism with BBHS ® coating (T-2 part #01B)

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Baader T-2 Stardiagonal (Zeiss) Prism with BBHS ® coating (T-2 part #01B)

# 2456095

€ 209.58 Price excl. German VAT tax (16%): € 180.67

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  • T-2/90 ° diagonal prism (BaK4 glass) with 35mm free aperture terminal objective side: 2 "or 1¼"
  • Connection eyepiece: 1¼ "
  • Prism made in accordance to Zeiss-norms, multi-coated, solid metal case, both sides T-2 connection threads, resulting in extremely short design and adaptable to each telescope system.
  • Not just the housing is significantly better and the prism is greater, also the planarity and the conformality of the prism faces are about 5x better than standard prisms in plastic housings.

Product Questions

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Are the BBHS coatings easy to clean? Do the coatings have a life comparable to your dielectric coatings? Do the coatings degrade over time and at what rate? Is there a difference in performance between your dielectric diagonal and the BBHS one, what are the differences and are they significant or very slight? I own an early Televue APO 4 inch refractor.
Question by: John on Sep 9, 2016 1:29:00 AM | 1 Answer(s)
I have a Baader 2" Clickclock diagonal mirror. Can I remove the 2" Clicklock from that diagonal and attach it to the T-2 Ziess prism diagonal?
Question by: Matt on Oct 3, 2019 6:56:00 PM | 1 Answer(s)
Does it make sense to use a T2-2" clicklock on this for a 2" eyepiece? Or it's better to just use 1.25" clickclock and eyepiece given the connection interface size is only T2.
Question by: Howard on Nov 3, 2017 4:14:00 AM | 1 Answer(s)
Dear Baader for my dobson 18' f4 do you suggest to use the T2 zeiss prism diagonal or the T2 mirror? I mostly observe planets hires more then deep sky objects. I was thinking to prism due to future binoviewer but I heard prism could be an issue on a fast f4 scope for bad correction
Question by: Jack on Sep 4, 2018 11:00:00 AM | 1 Answer(s)
I would like to know if the Baader Planetarium Prism T2 Diagonal 32mm MaxBright (#2456005) and also the Baader Planetarium StarDiagonal Prism T2/90 ( #2456095 ) have the BBHS silver coating on the prism ? I have ask about this here in the states but no one seems to know the answer.
Question by: Max Harrell on Jan 25, 2017 11:13:00 PM | 1 Answer(s)
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Additional Information

Manufacturer Baader Planetarium
SKU (#) 2456095
Weight (kg) 0.17
Optical Design Star Diagonal Prism
Inner Connection (lens sided) Thread, T-2 (M42 x 0,75)
Inner Connection (eyepiece/-camera-sided) Thread, M34
Outer Connection (eyepiece/-camera-sided) Thread, T-2 (M42 x 0,75)
Reflection surface Sealed BBHS coating
AR-Coating Phantom Coating® Group
Image Orientation Erect image, Mirror inverted
Optical length (mm) 38,5
Clamping System no clamp
Deflection angle 90°
Inner Diameter / Clear Aperture (mm) 34

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Marcus Z 172/06/2020 21/06/202016:04
  • Rating:
Sehr gutes Prisma!
Ein sehr gutes Zenitprisma! Durch die T2-Gewinde ist es vielseitig verwendbar. In meinem Falle mit einer Takahashi Okularklemme und variablen T2-Verlängerungshülsen, um den optischen Weg exakt auf einen Takahashi Extender einzustellen. Bezüglich der optischen Leistung ist es wie erwartet sehr gut.
  • universell einsetzbar
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