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Canada's top-tier Telescopes & Accessories
  • Navigating Tariffs: Due to the current volatile tariff environment and associated logistics challenges, O'Telescope is unable to fulfill shipments to the United States. Orders submitted with a U.S. shipping address will be refunded, with the payment gateway transaction fee deducted. This restriction does not affect BackyardEOS or BackyardNIKON, which remain available as digital downloads.

    Inventory closeout sale, everything must go.  Up to 60% off. Some conditions apply.

    We are closing our inventory side of the business and focusing solely on software - going back to our roots so to speak. No store coupons required, all prices have been marked down. First come, first served, until quantities last. We are no longer placing orders with manufacturers. Absolutely no rain checks. We reserve the right to cancel and refund orders at our sole discretion. We do our best to maintain our inventory accurate, but mistakes do happen, if you purchase an item that is no longer in stock, you will be refunded. The sale does not apply to some higher-end items such as 10Micron. Prices subject to change without notice. ALL SALES ARE FINAL.

    Occasionally, we find a box under a box under a box in the back of the warehouse with hidden treasures, and when we do, we add these items on the site, so even though you may not find what you're looking for today, it could automagically appear next week.

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D Series


34 products

  1. $110.84 CAD $221.68 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits all Celestron 11″ OTA’s including CPC and HD models. Used for attaching telescope OTA to existing mount or attaching accessories to top of OTA. Curved radius blocks and mounting hardware include. Uses existing mounting holes in OTA.18″ long, 1.72″ wide, .5″ thick, Wt. as shown 40 oz.

    INCLUDED ITEMS:

    -1x dovetail bar
    -2x curved radius blocks
    -2x safety stop
    -all necessary mounting hardware

  2. $157.18 CAD $314.35 CAD
    On sale

    ADM Accessories: Fits all Celestron 14″ OTA’s including CPC and HD models. Used for attaching telescope OTA to existing mount or attaching accessories to top of OTA. Curved radius blocks and mounting hardware include. Uses existing mounting holes in OTA. 18″ long, 1.72″ wide, .75″ thick, Wt. as shown 76 oz.

    INCLUDED ITEMS:

    -1x dovetail bar
    -2x curved radius blocks
    -2x safety stop
    -all necessary mounting hardware

     

    Out of Stock
  3. $64.51 CAD $129.01 CAD
    5 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series dovetail bars. Adds additional weight for balancing OTA’s. Split clamp design grips the dovetail bar along the entire surface of the saddle and will not dent or scratch the dovetail bar. The dovetail clamp has a large locking knob for tool free operation, spring loaded jaws, anodized aluminum and stainless steel construction. DPA- 2.5″ Long, 4″ Wide, .75″ Thick, Wt. 10 oz., Counterweight- 4″ Rounds, 1″ thick, 3.5 lbs.

    INCLUDED ITEMS:

    -1x DPA
    -1x 5″ Long 1/2×13 tpi threaded rod
    -1x 3.5lb Counterweight
    -mounting hardware

  4. $64.51 CAD $129.01 CAD
    2 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits V Series dovetail bars. Adds additional weight for balancing OTA’s. Split clamp design grips the dovetail bar along the entire surface of the saddle and will not dent or scratch the dovetail bar. The dovetail clamp has a large “T” handle locking knob for tool free operation, spring loaded jaws, anodized aluminum and stainless steel construction. DPA- 2.5″ Long, 4″ Wide, .75″ Thick, Wt. 10 oz., Counterweight- 4″ Rounds, 1″ thick, 3.5 lbs.

    INCLUDED ITEMS:

    -1x DPA
    -1x 3″ Long 1/2×13 tpi threaded rod
    -1x 3.5lb Counterweight
    -mounting hardware

  5. $68.37 CAD $136.73 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits V Series dovetail bars. Adds additional weight for balancing OTA’s especially the off-center saddle on the OEM Celestron CGEM and CGEM-DX. Split clamp design grips the dovetail bar along the entire surface of the saddle and will not dent or scratch the dovetail bar. The dovetail clamp has a large locking knob for tool free operation, spring loaded jaws, anodized aluminum and stainless steel construction. DPA- 2.5″ Long, 4″ Wide, .75″ Thick, Wt. 10 oz., Counterweight- 4″ Rounds, 1″ thick, 3.5 lbs.

    INCLUDED ITEMS:

    -1x DPA
    -1x 3″ Long 1/2×13 tpi threaded rod
    -1x 3.5lb Counterweight
    -mounting hardware

  6. $110.84 CAD $221.68 CAD
    On sale

    ADM Accessories: Fits all Meade 10″ OTA’s including LX and ACF. Used for attaching telescope OTA to existing mount or attaching accessories to top of OTA. Curved radius blocks and mounting hardware include. Uses existing mounting holes in OTA. 17″ long, 4.0″ wide, .5″ thick, Wt. as shown 36 oz.

    INCLUDED ITEMS:

    -1x dovetail bar
    -2x curved radius blocks
    -2x safety stop
    -all necessary mounting hardware

    Out of Stock
  7. $164.90 CAD $329.79 CAD
    On sale

    ADM Accessories: Fits all Meade 12″ OTA’s including LX and ACF. Used for attaching telescope OTA to existing mount or attaching accessories to top of OTA. Curved radius blocks and mounting hardware include. Uses existing mounting holes in OTA. 17″ long, 4.0″ wide, .75″ thick, Wt. as shown 36 oz.

    INCLUDED ITEMS:

    -1x dovetail bar
    -2x curved radius blocks
    -2x safety stop
    -all necessary mounting hardware

    Out of Stock
  8. $103.12 CAD $206.23 CAD
    On sale

    ADM Accessories: Fits all Meade 8″ OTA’s including LX and ACF. Used for attaching telescope OTA to existing mount or attaching accessories to top of OTA. Curved radius blocks and mounting hardware include. Uses existing mounting holes in OTA. 13.5″ long, 4.0″ wide, .5″ thick, Wt. as shown 32 oz.

    INCLUDED ITEMS:

    -1x dovetail bar
    -2x curved radius blocks
    -2x safety stop
    -all necessary mounting hardware

    Out of Stock
  9. $68.37 CAD $136.73 CAD
    3 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Double male male dovetail. Allows to convert a dovetail style Losmandy into a dovetail male. Can be used on frames with a female Losmandy base, CGEM, CGE, G11, etc. CNC machined from a single block of black anodized aluminum. It is hollowed out in the central part to lighten its weight. Supplied with safety stop screw.

  10. $41.34 CAD $82.68 CAD
    9 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series dovetail bars. D Series dovetail clamp allows you to attach accessories to a D series dovetail bar. Incorporates a split clamp design that grips the dovetail bar along the entire surface of the saddle and will not dent or scratch the dovetail bar. The dovetail clamp has a large locking knob for tool free operation, spring loaded jaws, anodized aluminum and stainless steel construction. 2.5″ Long, 4″ Wide, .75″ Thick, Wt. 10 oz.

    INCLUDED ITEMS:

    -1x DPA
    -2x 1/4×20 SHCS

  11. $60.65 CAD $121.29 CAD
    2 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Two female dovetails on each side of the single clamp. Allows mounting D Series male dovetails to D Series male dovetail. Split clamp design grips the dovetail bar along the entire surface of the saddle and will not dent or scratch the dovetail bar. The dovetail clamp has a large locking knob for tool free operation, spring loaded jaws, anodized aluminum and stainless steel construction. DPA- FF 2.5″ Long, 4″ Wide, 1″ Thick, Wt. 12 oz.

    INCLUDED ITEMS:

    -1x DPA-FF

  12. $64.51 CAD $129.01 CAD
    On sale

    ADM Accessories: Fits D Series dovetail bars. D Series dovetail clamp allows you to attach the QHY PoleMaster to a D series dovetail bar. Incorporates a split clamp design that grips the dovetail bar along the entire surface of the saddle and will not dent or scratch the dovetail bar. The dovetail clamp has a large locking knob for tool free operation, spring loaded jaws, anodized aluminum and stainless steel construction. 2.5″ Long, 4″ Wide, .75″ Thick, Wt. as shown 14 oz.

    INCLUDED ITEMS:

    -1x DPA-POLE
    -1x 1/4×20 SHCS

    Out of Stock
  13. $118.56 CAD $237.12 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series dovetail bars. Includes two 100mm (ID) adjustable guidescope rings with large delrin tipped thumb screws. Adjustable from 70mm – 90mm. Wt. as shown 34 oz.

    INCLUDED ITEMS:

    -2x adjustable guide scope rings
    -2x D Series dovetail clamps
    -2x riser blocks
    -mounting hardware

  14. $122.43 CAD $244.85 CAD
    On sale

    ADM Accessories: Fits D Series dovetail bars. Includes two 125mm (ID) adjustable guidescope rings with large delrin tipped thumb screws. Adjustable from 70mm – 110mm. Wt. as shown 36 oz.

    INCLUDED ITEMS:

    -2x adjustable guide scope rings
    -2x D Series dovetail clamps
    -mounting hardware

    Out of Stock
  15. $126.29 CAD $252.57 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series dovetail bars. Includes two 150mm (ID) adjustable guidescope rings with large delrin tipped thumb screws. Adjustable from 95mm – 135mm. Wt. as shown 40 oz.

    INCLUDED ITEMS:

    -2x adjustable guide scope rings
    -2x D Series dovetail clamps
    -mounting hardware

  16. $114.70 CAD $229.40 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series dovetail bars. Includes two 90mm (ID) adjustable guidescope rings with large delrin tipped thumb screws. Adjustable from 60mm – 80mm. Wt. as shown 32 oz.

    INCLUDED ITEMS:

    -2x adjustable guide scope rings
    -2x D Series dovetail clamps
    -2x riser blocks
    -mounting hardware

  17. $180.34 CAD $360.68 CAD
    On sale

    ADM Accessories -Fits D Series saddles and accessories.
    -Superior maching and beautifuly finished.
    -Precision machined from billet 6061 T-6 aluminum.
    -Designed specifically for the Takahashi FS-60CB, Sky 90, FS-102, FSQ-106, FS-128, and TOA-130.
    -Two clamshell mounting locations.
    -12″ Long 4″ wide plate, 3″ wide dovetail, Wt oz.

    INCLUDED ITEMS:
    -dovetail bar
    -2x 8mm SHCS
    -2x safety stop

    Out of Stock
  18. $64.51 CAD $129.01 CAD
    4 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles and accessories. Can be used for attaching a variety of accessories. 11″ Long, 4″ wide plate, 3″ wide dovetail, .5″ thick, Wt. 27 oz.

    INCLUDED ITEMS:

    -dovetail bar
    -4x 1/4×20 SHCS
    -4x 6mm SHCS
    -2x safety stop

  19. $68.37 CAD $136.73 CAD
    On sale

    ADM Accessories: Fits D Series saddles and accessories. Can be used for attaching a variety of accessories. 11″ Long, 4″ wide plate, 3″ wide dovetail, .5″ thick, Wt. 27 oz.

    INCLUDED ITEMS:

    -dovetail bar
    -4x 1/4×20 low profile SHCS
    -4x 6mm low profile SHCS
    -2x safety stop

    Out of Stock
  20. $64.51 CAD $129.01 CAD
    2 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles and accessories. Can be used for attaching a variety of accessories. 11″ Long, 4″ wide plate, 3″ wide dovetail, .5″ thick, Wt. 28 oz.

    INCLUDED ITEMS:

    -dovetail bar
    -2x 8mm SHCS
    -2x safety stop

  21. $68.37 CAD $136.73 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles and accessories. Can be used for attaching a variety of accessories. 15″ Long, 4″ wide plate, 3″ wide dovetail, .5″ thick, Wt. 35 oz.

    INCLUDED ITEMS:

    -dovetail bar
    -4x 1/4×20 SHCS
    -4x 6mm SHCS
    -2x safety stop

  22. $103.12 CAD $206.23 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles and accessories. Can be used for attaching a variety of accessories. 21″ Long, 4″ wide plate, 3″ wide dovetail, .75″ thick, Wt. 84.oz.

    INCLUDED ITEMS:

    -dovetail bar
    -4x 1/4×20 SHCS
    -4x 6mm SHCS
    -2x safety stop

  23. $134.01 CAD $268.01 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles and accessories. Can be used for attaching a variety of accessories. 31″ Long, 4″ wide plate, 3″ wide dovetail, .75″ thick, Wt. 122 oz.

    INCLUDED ITEMS:

    -dovetail bar
    -4x 1/4×20 SHCS
    -4x 6mm SHCS
    -2x safety stop

  24. $41.34 CAD $82.68 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles and accessories. Can be used for attaching a variety of accessories. 4″ Long, 4″ wide plate, 3″ wide dovetail, .5″ thick, Wt. 8 oz.

    INCLUDED ITEMS:

    -dovetail bar
    -2x 1/4×20 SHCS
    -2x 6mm SHCS

  25. $56.79 CAD $113.57 CAD
    3 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles and accessories. Can be used for attaching a variety of accessories. 7″ Long, 4″ wide plate, 3″ wide dovetail, .5″ thick, Wt. 16 oz.

    INCLUDED ITEMS:

    -dovetail bar
    -4x 1/4×20 SHCS
    -4x 6mm SHCS
    -1x safety stop

  26. $60.65 CAD $121.29 CAD
    2 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles and accessories. Can be used for attaching a variety of accessories. 7″ Long, 4″ wide plate, 3″ wide dovetail, .5″ thick, Wt. 16 oz.

    INCLUDED ITEMS:

    -dovetail bar
    -4x 1/4×20 low profile SHCS
    -4x 6mm low profile SHCS
    -1x safety stop

  27. $56.79 CAD $113.57 CAD
    On sale

    ADM Accessories: Fits D Series saddles and accessories. Can be used for attaching a variety of accessories. 7″ Long, 4″ wide plate, 3″ wide dovetail, .5″ thick, Wt. 16 oz.

    INCLUDED ITEMS:

    -dovetail bar
    -2x 8mm SHCS
    -1x safety stop

    Out of Stock
  28. $110.84 CAD $221.68 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles. Includes two 100mm (ID) adjustable guidescope rings with large delrin tipped thumb screws. Adjustable from 70mm – 90mm. Wt. as shown 30 oz.

    INCLUDED ITEMS:

    -2x adjustable guide scope rings
    -1x DUP7
    -mounting hardware

  29. $103.12 CAD $206.23 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles. Includes two 75mm (ID) adjustable guidescope rings with large delrin tipped thumb screws mounted to a 7″ D Series universal dovetail bar. Adjustable from 40mm – 70mm. Wt. as shown 26 oz.

    INCLUDED ITEMS:

    -2x adjustable guide scope rings
    -1x DUP7
    -mounting hardware

  30. $106.98 CAD $213.96 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series saddles. Includes two 90mm (ID) adjustable guidescope rings with large delrin tipped thumb screws. Adjustable from 60mm – 80mm. Wt. as shown 28 oz.

    INCLUDED ITEMS:

    -2x adjustable guide scope rings
    -1x DUP7
    -mounting hardware

  31. $33.62 CAD $67.23 CAD
    4 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Extra 3.5 lb Counterweight for 1/2 x 13tpi threaded rod. Powdercoated for added durability. 4″ Round, 1″ thick, Wt 3.5lbs

  32. $196.56 CAD $393.11 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: -Cleverly named after my lovely wife.
    -Camera rotator and support system for large lenses.
    -Allows camera rotation up to 90 degrees.
    -Custom Brackets Digital Pro-SV camera rotator included. Pro-SV’s are used and may show some signs of use.
    -Male dovetail version is perfect for side by side dovetail systems.
    -Weighs 2.4 lbs. as shown.
    -2.5″, 2″, 1.5″ and 1″ 80/20 risers included (tapped on both ends).
    -Includes adjustable 100mm ring. Other sizes available on request.

  33. $114.70 CAD $229.40 CAD
    1 in stock On sale
    Back Order / Waiting List

    ADM Accessories: Fits D Series dovetail bars. Includes two 90mm (ID) adjustable guidescope rings with large delrin tipped thumb screws mounted to a single D Series saddle style clamp. Adjustable from 60mm – 80mm. Ring separation 6″ or 4″. Wt. as shown 32 oz.

    INCLUDED ITEMS:

    -2x adjustable guide scope rings
    -1x D Series saddle style clamps
    -2x riser blocks
    -mounting hardware

  34. $14.31 CAD $28.62 CAD
    4 in stock On sale
    Back Order / Waiting List

    ADM Accessories: 1/2x13tpi Stainless Steel Threaded Rod.  1/4x20 tapped hole on one end and a rounded end on opposite end.  Available in 3” or 5” lengths.  Perfect for adding extra threaded counterweights

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