What are dovetail bars?

BBC Sky at Night Magazine's Scope Doctor Steve Richards answers your astronomy ailments.

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Published: May 19, 2020 at 7:25 am

Dovetail bars attach to your telescope either directly or via tube rings, and to your mount via a clamp, making it quick to install and remove the telescope.

Dovetail bars are so called because their cross-section has the appearance of a dove’s tail, and it is this tapered profile that makes them safe and secure in use.

There are two main types of dovetail bar:

  • The traditional Vixen style with a width of approximately 1.75 inches
  • The heavier duty Losmandy stylewith a width of approximately 3 inches

Although the latter has an overhanging ‘table’ of 4 inches in width.

It is common these days for mounts to have dovetail clamps that will accommodate both dovetail sizes.

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