Diagonals

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  1. Orion - 1.25" Enhanced Mirror Star Telescope Diagonal

    $69.99
    SKU: ORI-08879

    Ships in 3-5 Days

    Don't put a standard-issue diagonal into a high-quality refractor or Cassegrain telescope or you'll be losing 10% or more of the light collected by the telescope's optics.

  2. TeleVue - 90° Enhanced 2" Star Diagonal (Satin)*

    Regular Price: $225.00

    You Pay: $215.00

    SKU: TEL-DSC-8001

    Ships in 3-5 Days

    This is the same 2-inch Star Diagonal that comes with the Tele-Vue 85 and the Pronto. Exquisitely crafted to fold light exactly 90 degrees.

    FREE SHIPPING(48 States)
  3. Meade - 99% Reflectivity Mirror Diagonal and 24mm Ultra-Wide Angle (UWA) Eyepiece Kit

    Regular Price: $449.00

    You Pay: $249.00

    SKU: MEA-07681

    In stock

    Meade Series 5000 UltraWide Angle 24mm Eyepiece (2") #07681 features a staggering 82 degree apparent field of view Meade Series 5000 Ultra Wide Angle Eyepieces use 7 optical elements to achieve a high contrast image with razor sharp correction all the way to the edge of the field.

    FREE SHIPPING(48 States)
  4. Olivon - 2" Diagonal Erecting Prism

    $129.00
    SKU: OL2DIAG-US

    Ships in 3-5 Days

    Olivon 2" - 1.25" 90° Prism Diagonal w/BAK4 & FMC Coating

  5. Astro-Tech - 1.25" Dielectric Coated Star Diagonal with Compression Ring

    $69.95
    SKU: AST-AT1D

    In stock

    This 1.25” Astro-Tech first-surface mirror star diagonal was named a Sky & Telescope Hot Product for 2007!

  6. Orion - 1.25" Deluxe 45-degree Correct-Image Prism Diagonal

    $79.99
    SKU: ORI-08754

    Ships in 3-5 Days

    Turn any refractor or Cassegrain telescope into a high-performance daytime spotting scope with our Deluxe 45° Correct-Image Diagonal.   

  7. Baader - Clicklock Dielectric Star Diagonal - 2"

    $297.00
    SKU: MAX-2C

    Ships in 3-5 Days

    With their ground-breaking introduction several years ago of the all-dielectric 2" Maxbright star diagonal, Baader Planetarium brought mirror star diagonals into the 21st century.

    FREE SHIPPING(48 States)
  8. Baader - Erecting Prism 1.25"

    $92.00
    SKU: AMICI-45

    Ships in 3-5 Days

    Erecting prism with a 45° viewing position used for terrestrial observation. They show an upright and correctly orientated image.

  9. Baader - Precision Amici Diagonal

    $299.00
    SKU: AMICI-DX1

    Ships in 3-5 Days

    The Amici Prism has long been favored as the best choice for producing correctly oriented images in refractors and cassegrain type telescopes.

    FREE SHIPPING(48 States)
  10. Explore Scientific - TDM Adapter with Encoder 16" ACF (requires 0721004 TDM Controller with Cable)

    $1,599.99
    SKU: EXP-0721260

    Ships in 3-5 Days

    TDM Adapter with Encoder 16" ACF (requires 0721004 TDM Controller with Cable)

    FREE SHIPPING(48 States)
  11. Explore Scientific - TDM Telescope Drive Master Encoder Only (Requires Mount Specific Adapter)

    $899.99
    SKU: EXP-0721001

    Ships in 3-5 Days

    TDM Telescope Drive Master Encoder Only (Requires Mount Specific Adapter)

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  12. Explore Scientific -TDM Adapter iOptron iEQ45

    $469.99
    SKU: EXP-0721045

    Ships in 3-5 Days

    TDM Adapter iOptron iEQ45

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  13. Explore Scientific - TDM Telescope Drive Master Ver. 2 Encoder and Electronics Set (Requires Mount Adapter)

    $1,799.99
    SKU: EXP-721000

    Ships in 3-5 Days

    TDM Telescope Drive Master Ver. 2 Encoder and Electronics Set (Requires Mount Adapter)
    FREE SHIPPING(48 States)
  14. Explore Scientific - TDM Adapter for Meade LX200ACF

    $729.99
    SKU: EXP-0721250

    Ships in 3-5 Days

    TDM Adapter for MEADE LX200ACF
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  15. Explore Scientific - TDM Adapter for Meade LX200 8"-12"

    $729.99
    SKU: EXP-0721220

    Ships in 3-5 Days

    TDM Adapter for MEADE LX200 8“-12“
    FREE SHIPPING(48 States)
  16. Explore Scientific - TDM Adapter for Astro Physics 1200 Mount

    $329.99
    SKU: EXP-0721200

    Ships in 3-5 Days

    TDM Adapter for Astro Physics 1200 Mount

    FREE SHIPPING(48 States)
  17. Explore Scientific - TDM Adapter for Meade LXD75

    $479.99
    SKU: EXP-0721075

    Ships in 3-5 Days

    You need this adapter to attach the TDM to your MEADE LXD75 mount.

    FREE SHIPPING(48 States)
  18. Explore Scientific - 3" ES Diagonal

    $399.99
    SKU: EXP-DD03-01CF

    In stock

    Diagonal for 3" Eyepieces. Will work with the Explore Scientific 30mm 100° Series eyepiece.

    FREE SHIPPING(48 States)
  19. Explore Scientific - 2" 99% Reflectivity ES Diagonal

    $129.99
    SKU: EXP-DD02-00CF

    In stock

    The Explore Scientific 2" Dielectric Diagonal is a nice light weight diagonal. The engineers at Explore Scientific were able to achieve weight savings when compared to traditional diagonals replacing some of the base material with carbon fiber material

  20. PrimaLuceLab - XP 90° 31.8mm Dielectric Diagonal

    $85.00
    SKU: PRI-PLL-XP90318

    In stock

    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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