Ask Our Experts800-606-6969
Hello, Log InAccount & Orders
Telescope Diagonals & Prisms
28 Items
Filter by:
Sort by:
View:
Alpine Astronomical Baader 2" 90° Amici Erecting Diagonal
BH # ALAMICI2 MFR # AMICI-2
Key Features
- 2" Holder and Nosepiece
- 1.25" Eyepiece Reducer Adapter
- 7-Layer Anti-Reflection Multi-Coatings
- Large 38mm Clear Aperture
Available in other Styles, Configurations & Kits
Celestron 90° Dielectric Star Diagonal with Twist-Lock (1.25")
BH # CEDSDTL125 MFR # 93571
Key Features
- 1.25" Nose Piece and Holder
- BK7 Glass, Diffraction-Limited Optics
- 58-Layer Dielectric Coatings
- Over 99% Reflective Mirror Surfaces
Available in other Styles, Configurations & Kits
Top Seller
Celestron 90° Dielectric Star Diagonal with Twist-Lock (2")
BH # CEDSDTL2 MFR # 93573
Key Features
- 2" Eyepiece Holder with 1.25" Reducer
- Adapter for Connection to SCT Backs
- BK7 Glass, Diffraction-Limited Optics
- 58-Layer Dielectric Coatings
Available in other Styles, Configurations & Kits
Celestron 45-Degree Erect Diagonal (1.25")
BH # CEDEI451.25 MFR # 94112-A
Alpine Astronomical Baader T-2 90° Prism Star Diagonal Housing
BH # ALT201C MFR # T2-01C
Key Features
- Part of the Astro T-2 Modular System
- 32mm Clear Mirror Aperture
- T2 Male and T2 Female Threads
- Highly Reflective Mirror Coatings
Available in other Styles, Configurations & Kits
Tele Vue Everbrite 90° Star Diagonal Reducer Kit (2")
BH # TEDDP8004 MFR # DDP-8004
Key Features
- 2" Barrel and Eyepiece Holder
- 99% Reflective Everbrite Mirror Coatings
- Broadband Reflectivity for Natural Color
- Pyrex Optical Glass Mirror
Available in other Styles, Configurations & Kits
Alpine Astronomical Baader 45° Erecting Amici Prism for Maxbright Binoviewer (1.25")
BH # ALMAXAMICI MFR # MAXAMICI
Key Features
- Corrects View for Terrestrial Use
- Anti-Reflection Multi-Coated Optics
- Total Reflection Prism Coatings
- Integrated 2x Glasspath Corrector
Explore Scientific 2" ES Star Diagonal
BH # EXDD0200CF MFR # DD02-00CF
Key Features
- 2" Diameter Barrel
- 1.25" Eyepiece Adapter
- Dielectric-Coated Mirror
- 99% Reflective Surface Mirror
Tele Vue 90-Degree Everbrite Mirror Diagonal (1.25")
BH # TE190E MFR # DPC-1250
Available in other Styles, Configurations & Kits
Alpine Astronomical Baader T-2 90° Astro Amici Erecting Diagonal
BH # ALAMICIDX1 MFR # AMICI-DX1
Key Features
- Part of the Astro T-2 Modular System
- Standard Male and Female T-2 Threads
- Broadband BBHS Internal Mirror Coatings
- Anti-Reflection Phantom Group Coatings
Available in other Styles, Configurations & Kits
Tele Vue Everbrite 90° Star Diagonal Schmidt-Cassegrain Kit (2")
BH # TESCP8202 MFR # SCP-8202
Key Features
- 2" Barrel and Eyepiece Holder
- 99% Reflective Everbrite Mirror Coatings
- Broadband Reflectivity for Natural Color
- Pyrex Optical Glass Mirror
Available in other Styles, Configurations & Kits
Alpine Astronomical Baader 2" 90° Deluxe Astro Amici Erecting Diagonal
BH # ALAMICIDX2 MFR # AMICI-DX2
Key Features
- Amici Erect-Image Diagonal
- Broadband BBHS Internal Mirror Coatings
- Anti-Reflection Phantom Group Coatings
- Horizontal/Vertical Corrected Views
Available in other Styles, Configurations & Kits
SVBONY 90° Dielectric Mirror Diagonal (2")
BH # SVF9171D MFR # F9171D
Key Features
- For More Comfortable Viewing
- Shows Subjects Right-Side Up
- Dielectric-Coated Mirror
- Over 99% Reflective Mirror Surfaces
iOptron 90° Dielectric Star Diagonal (1.25")
BH # IO6231 MFR # 6231
Key Features
- Ideal for Refractor or Catadioptric OTAs
- 1.25" Diameter Barrel
- Dielectric-Coated BK-7 Glass Mirror
- 99% Reflective Surface Mirror
Available in other Styles, Configurations & Kits
Snypex 45-degree Erect Image Roof Prism for the Knight PT Digiscope
BH # SN45EIRP MFR # SNY PT72-45AA
Key Features
- For the Knight PT 72mm-ED-APO Digiscope
- Accepts 1.25" Eyepieces and Accessories
Alpine Astronomical Baader 1.25" 45° Amici Erecting Diagonal
BH # ALAMICI45 MFR # AMICI-45
Key Features
- 1.25" Holder and Nosepiece
- Anti-Reflection Multi-Coatings
- Large 24mm Clear Aperture
- Standard 1.25" Eyepiece Filter Threads
Available in other Styles, Configurations & Kits
iOptron 90° Dielectric Star Diagonal (2")
BH # IO6232 MFR # 6232
Key Features
- Ideal for Refractor or Catadioptric OTAs
- Large 2" Diameter Barrel
- 1.25" Reducer Adapter Included
- Dielectric-Coated BK-7 Glass Mirror
Available in other Styles, Configurations & Kits
Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes
BH # CEDM2S MFR # 93527
Key Features
- Upright, Laterally-Reversed Images
- Fits Catadioptric 2"-18 Rear Threads
- Starbright XLT Coatings
Alpine Astronomical Baader Zenith Prism Star Diagonal (1.25")
BH # ALPRISM1 MFR # PRISM-1
Key Features
- Baader Deluxe 1.25"/T-2 Eyepiece Holder
- Tight Fit for Accurate Optical Alignment
- Bronze Compression Ring, 3 Set Screws
- Locking Micro-Focusing Mechanism
Available in other Styles, Configurations & Kits
Alpine Astronomical Baader 2" 45° Amici Erecting Diagonal
BH # ALAMICI452 MFR # AMICI-45-2
Key Features
- 2" Holder and SCT Mount Threads
- 1.25" Eyepiece Reducer Adapter
- Anti-Reflection Multi-Coatings
- Not Recommended for High Magnifications
Available in other Styles, Configurations & Kits
Alpine Astronomical Baader 90° T-2 Star Diagonal Prism
BH # ALT201B MFR # T2-01B
Key Features
- BAK4 Prism Glass
- Phantom Group Multi-Coated
- Broadband Hard-Silver (BBHS) Coated
- Male T-2 Threads, Female T-2 Threads
Alpine Astronomical Baader T-2 Maxbright Sitall Mirror Star Diagonal (1.25")
BH # ALMAX1 MFR # MAX-1
Key Features
- Part of the T-2 Astro Modular System
- Accepts 1.25" T-2 Accessories
- Dielectrically Coated, 99% Reflective
- High Thermal Stability Mirror
Available in other Styles, Configurations & Kits
Alpine Astronomical Baader T-2 BBHS Sitall Mirror Diagonal Star Diagonal (1.25")
BH # ALMAX1S MFR # MAX-1S
Key Features
- Part of the T-2 Astro Modular System
- Broadband Hard Silver Coated
- Opitmized for 390-2000nm Spectral Range
- Sitall Glass-Ceramic Mirror
Available in other Styles, Configurations & Kits
Alpine Astronomical Baader ClickLock Mirror Star Diagonal (2")
BH # ALCLDIAG2 MFR # CLDIAG-2
Key Features
- 2" Nosepiece & ClickLock Eyepiece Clamp
- Dielectric-Coated Mirror
- 99% Reflective Surface Mirror
- Thermally Stable - Resists Heat
$34700
Temporarily Out of Stock
Alpine Astronomical Baader FlipMirror II Star Diagonal
BH # ALBFMII MFR # BFM-II
Key Features
- Essential for Accurate Astrophotography
- Three Ports for Cameras & Accessories
- Multi-Layer Aluminum-Coated Flip Mirror
- Precise Adjustments for All Light Paths
Tele Vue 1.25" 60° Everbrite Star Diagonal
BH # TE160E MFR # DPC-6012
Key Features
- Comfortable 60° Viewing Angle
- 1.25" Barrel and Eyepiece Holder
- Corrects Image Vertically Only
Explore Scientific 3" ES Star Diagonal
BH # EXDD0301CF MFR # DD03-01CF
Key Features
- 3" Diameter Barrel
- 2" Eyepiece Adapter Included
- Optional 2" Eyepiece Adapter Supported
- Dielectric-Coated Mirror