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Mars in 2005

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2.5" Riser Blocks for Refractors - FREE shipping!1

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  • These risers lift your entire telescope 2.5" (64.80mm) above the dovetail bar, allowing for the full rotation of the focuser. This also prevents OAGs/filter wheels from pressing against the ground when the scope is not being used. 

Installation is done by putting the included M6 screws through the bottom of the dovetail and threading it into the tube rings. The included washers can be used to prevent the screws from going into the OTA if required. See last image for the technical diagram and additional details.


Compatibility is based on the type of thread your tube rings use. As long as you can find a 3" (75mm) length screw for your rings the risers will work (the telescope itself is irrelevant).
  • The majority of refractor rings use an M6 thread, but some such as Stellarvue and Sky-Watcher use a 1/4-20" imperial thread.
  • However, if you need 1/4-20" screws I can send you those instead of the metric ones.
  • I can also modify the size of the holes if your refractor uses a thread larger than 7mm.

  • Two 2.5" (64.80mm) riser blocks made out of PETG material
  • Two M6x75mm screws (more screws can be purchased if needed)


Interac E-transfer (Canadians) and PayPal are accepted.

Price includes shipping to the United States only. Contact me for a shipping quote anywhere else (Include your zip / postal code).