Baader T-2 BBHS ® Mirror Diagonal

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Baader T-2 BBHS ® Mirror Diagonal

# 2456103

€ 259.00 Price excl. German VAT tax (19%): € 217.65

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  • T-2 BBHS star diagonal without T-2 outer threads. Provides greatest reflectance over most spectral range from 390 to 2000nm
  • Much higher in brilliance than cheap dielectric coatings
  • BBHS = Broadband Hardsilver coating with dielectric protective overcoating
  • T-2 BBHS-Sitall zenith mirrors on both sides with T-2 Photo thread

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)
Would you recommend a T2 BBHS prism or T2 mirror diagonal for an f/8 apochromatic refractor?
Question by: loki on Oct 15, 2021 9:40:00 AM | 1 Answer(s)
Dear Baader,

Is it possible to remove the male thread of this star diagonal? If yes, is it a T2 female thread remaining?
Question by: Pierre-André Tapparel on Feb 7, 2022 7:40:00 AM | 1 Answer(s)
Is it possible to collimate your diagonals so swapping them with TQC/TCR doen't affect the OTA's collimation?

Question by: Pierre-André Tapparel on Mar 24, 2022 4:07:00 PM | 1 Answer(s)
Question by: Peter Boender on Apr 26, 2019 9:42:00 PM | 1 Answer(s)
I recently purchased one of your star diagonals. It is the T-2 BBHS Star Diagonal #2456103. I have read on your website that the optical path length is 43mm. However, I do not know the reference points for that measurement. For my star diagonal, do you have a diagram similar to the one in the link below?
Or, can you please describe to me where the optical path begins and ends on the diagonal body?
I need this information so I can accurately determine and measure backfocus distance.
Thank you,
John L
Question by: John on Jul 26, 2020 10:10:00 PM | 1 Answer(s)
The mirror of the 2456103 diagonal it is mage of ceramic Sitall?

D. Barounis
Question by: D. Barounis on Apr 27, 2020 8:16:00 AM | 1 Answer(s)
In regards to this style of diagonal, please clarify T-2 fitting?..
Are the threads (standard) for say a 2inch telescope eyepiece that could directly attach to this unit from the bottom barrel of it? Yes or no? .if not what is the diameter/threading of a T-2 fitting?
Thanks Dennis
Question by: Dennis Young on Dec 6, 2018 6:40:00 PM | 1 Answer(s)
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Additional Information

Manufacturer Baader Planetarium
SKU (#) 2456103
Net weight (kg) 0.18
Optical Design Mirror Diagonal
Outer Connection (lens sided) Thread, T-2 (M42 x 0,75)
Inner Connection (eyepiece/-camera-sided) Thread, T-2 (M42 x 0,75)
Reflection surface BBHS coated, Dielectrically protected
Image Orientation Erect image, Mirror inverted
Optical length (mm) 43
Clamping System no clamp
Deflection angle 90°
Inner Diameter / Clear Aperture (mm) 33

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