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Diagonals

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  1. PrimaLuceLab XP 90° 50.8mm Dielectric Diagonal

    PrimaLuce Lab - XP 90° 50.8mm Dielectric Diagonal

    PrimaLuceLab XP dielectric diagonal mirrors have raised the bar when it comes to optical accessories thanks to their high optical and mechanical quality at a great price.

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    Model#: PLL-XP90508

    In Stock

    $169.00

  2. PrimaLuceLab XP 90° 31.8mm Dielectric Diagonal

    PrimaLuce Lab - XP 90° 31.8mm Dielectric Diagonal

    PrimaLuceLab XP dielectric diagonal mirrors have raised the bar when it comes to optical accessories thanks to their high optical and mechanical quality at a great price.

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    Model#: PLL-XP90318

    In Stock

    $117.00

  3. PrimaLuceLab DX45 31.8mm Erect Image Prism

    PrimaLuce Lab - DX45 31.8mm Erect Image Prism

    The PrimaLuceLab AIRY apochromatic refractors (and other quality refractors from different brands) are intended to observe and image the wonders of the Universe, but they're excellent for visual observing as well good accessories are added in the mix that can turn them into spotting scopes!

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    Model#: PLL-DX45

    In Stock

    $91.00

  4. iOptron - 45° Erect-Image Diagonal - 1.25"

    iOptron - 45° Erect-Image Diagonal - 1.25"

    Use the iOptron 45° Erect-Image Diagonal to correct images horizontally and vertically when using an astronomical telescope as a spotting scope.

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    Model#: TDE100

    Available

    $25.00

  5. Astro-Physics MaxBright Diagonal

    Astro-Physics - MaxBright Diagonal

    Please Note: We cannot ship Astro-Physics products to customers in Germany, Switzerland, Austria, France and Japan.

    The Astro-Physics 2" MaxBright Diagonal was designed with several unique features to provide optimum performance and years of use.

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    Model#: PMDMAX

    Available - Typically ships in 1-3 Days

    $320.00

  6. Baader Planetarium - 2" Clicklock Mirror Diagonal

    Baader Planetarium - 2" Clicklock Mirror Diagonal

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    FREE SHIPPING
    (48 States)
    Model#: CLDIAG-2

    Available

    $299.00

  7. Baader Planetarium - 2" Universal Star Diagonal Prism, Black Housing with Zeiss Prism and 2" Clicklock Clamp
  8. Baader Planetarium Prism Diagonal T2/90 32mm Maxbright
  9. Baader Planetarium Prism Diagonal T-2/90°

    Baader Planetarium - Prism Diagonal T-2/90° 32mm with 1.25" Eyepiece Holder and 1.25" Nosepiece

    The Baader T2 diagonals offer large free apertures with flexibility to most telescopes without vignetting problem.

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    Model#: PRISM-1

    Available

    $169.00

  10. Lunt  -  Calcium Module (Ca-K) with B1200 Blocking Filter  -  in Straight Thru 2" Tube with T2 & 2" connection

    Lunt - Calcium Module (Ca-K) with B1200 Blocking Filter - in Straight Thru 2" Tube with T2 & 2" connection

    Lunt Calcium K B1200 CAK Straight

    Calcium K (Ca-K) Telescopes and Filters are used to study the

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    Model#: LS1200CAKS

    In Stock

    $1,018.00

  11. Baader Planetarium 2" Maxbright Mirror Diagonal

    Baader Planetarium - 2" Maxbright Mirror Diagonal

    The Baader Planetarium 2" Maxbright Mirror Diagonal includes a 2" removable eyepiece holder, compression ring, two large thumbscrews and 2" nosepiece, making the diagonal suitable for most 2" astronomy filters.

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    FREE SHIPPING
    (48 States)
    Model#: MAX-2

    Available

    $459.00

  12. Vernonscope 2" 1/20th Wave Quartz Star Diagonal

    Vernonscope - 2" 1/20th Wave Quartz Star Diagonal

    The Vernonscope 2" Wave Quartz Star Diagonal is composed of a 99% reflective mirror that is considered one the best in the world because of the Zygo interferometer printout included.

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    FREE SHIPPING
    (48 States)
    Model#: VRN2IN120DIAG

    Available

    $795.00

  13. Vernonscope 1.25" 1/20th Wave Quartz Star Diagonal

    Vernonscope - 1.25" 1/20th Wave Quartz Star Diagonal

    The Vernonscope 1.25" Wave Quartz Star Diagonal is composed of a 99% reflective mirror that is considered one the best in the world because of the Zygo interferometer printout included.

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    FREE SHIPPING
    (48 States)
    Model#: VRN114DIAG

    Available

    $495.00

  14. Baader Planetarium T-2 Prism Star Diagonal

    Baader Planetarium - T-2 Prism Star Diagonal

    The Baader Planetarium T-2 Prism Star Diagonal is easily the finest prism star diagonal available today.

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    FREE SHIPPING
    (48 States)
    Model#: T2-01B

    Available

    $272.00

  15. PlaneWave Stellarvue 2" Mirror Diagonal

    PlaneWave - Stellarvue 2" Mirror Diagonal

    This mirror star diagonal features a thick, oversized mirror. Polished to 1/10th wave minimum and coated with a protective, dielectric coating with 99% reflectivity.

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    Model#: D1029ED

    This item typically has a delivery time of 8-12 weeks. Place your order today to reserve.

    $199.00

  16. Olivon - 2" 90° Erecting Image Roof Prism Diagonal

    Olivon - 2" 90° Erecting Image Roof Prism Diagonal

    NEW!! Olivon 2" 90° Erecting Image Roof Prism Diagonal with 1.25" adapter included. Fully Multi-Coated BK7 prism. An excellent diagonal for looking at the moon and the stars.

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    Model#: OL2EIDIAG-US

    Available

    $189.00

  17. Explore Scientific - TDM Adapter for Vixen GPDX / Celestron CAM/GT5

    Explore Scientific - TDM Adapter for Vixen GPDX / Celestron CAM/GT5

    TDM Adapter for Vixen GPDX / Celestron CAM/GT5

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    FREE SHIPPING
    (48 States)
    Model#: 0721070

    Available

    $489.99

  18. Explore Scientific TDM Adapter for Synta/Sky-Watcher EQ6 Mount (Modified)

    Explore Scientific - TDM Adapter for Synta/Sky-Watcher EQ6 Mount (Modified)

    TDM Adapter for Synta/Sky-Watcher EQ6 Mount (Modified)

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    FREE SHIPPING
    (48 States)
    Model#: 0721062

    Available

    $509.99

  19. Explore Scientific TDM Adapter for Synta/Sky-Watcher EQ6 Mount (Original Version)

    Explore Scientific - TDM Adapter for Synta/Sky-Watcher EQ6 Mount (Original Version)

    TDM Adapter for Synta/Sky-Watcher EQ6 Mount (Original Version)

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    FREE SHIPPING
    (48 States)
    Model#: 0721060

    Available

    $459.99

  20. Meade - 45 degree Hybrid Erecting Prism

    Meade - 45 degree Hybrid Erecting Prism

    Telescopes contain internal mirrors that reflect light to the telescope's astronomical observing position

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    Model#: MEA-07217

    In Stock

    $39.99

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