Selles

Saddle Design and Clamping Quality

A saddle's job is to hold a dovetail without allowing rotation or translation. How well it does that depends on contact area and clamping geometry rather than on how tightly you turn the knob.

• Face-clamping designs: Grip along the full angled faces of the dovetail, distributing load and resisting rotation far better than point contact.
• Set-screw saddles: A single screw pressing on the dovetail's flat, common on entry-level mounts. Adequate for light loads and a genuine weak point under heavy ones.
• Dual-fit saddles: Accept both Vixen and Losmandy dovetails, convenient but often gripping a narrow bar on its edges rather than its faces.
• Saddle length: A longer saddle grips more of the dovetail and resists pitching, which matters for long tubes with rearward camera loads.
• Safety stops: Screws or pins that prevent a loosened dovetail sliding out entirely — worth having on any expensive optic.
• Clamp upgrades: Many mounts accept a replacement saddle that improves grip substantially without changing anything else.

Why Choose David Astro for Mount Saddles

A saddle upgrade is one of the few inexpensive changes that visibly improves guiding.

• Mount-specific fitment: Saddle mounting patterns vary. We confirm the replacement bolts to your mount's head before shipping.
• Grip diagnosed properly: If your stars degrade at specific tube orientations, we will help determine whether the saddle, the dovetail or the rings is responsible.
• Standard matched: We confirm your dovetail standard and recommend a saddle that grips its faces rather than one that merely accepts it.
• Authorized dealer: Genuine hardware with manufacturer warranty, in Canadian stock.
• Ships from Canada: No duties or brokerage fees for Canadian buyers.

Mount Saddles in Canada — Frequently Asked Questions

Is my saddle limiting my guiding?

If guiding degrades at particular tube angles, or you can rock the telescope slightly by hand with the clamp tight, the saddle is a likely culprit. It is worth checking before blaming the mount.

Are dual-fit saddles a compromise?

Somewhat. Accepting both standards usually means a narrow Vixen bar contacts on its edges rather than its faces. It is convenient and slightly less rigid than a dedicated saddle.

Can I upgrade the saddle on my mount?

On many mounts, yes, and it is a cost-effective rigidity improvement. Tell us the mount model and we will confirm whether a replacement saddle exists for it.

Do I need a safety stop?

Strongly recommended on any valuable optic. A dovetail that loosens without a stop can slide out of the saddle entirely, and that failure mode is always expensive.

Improving mount rigidity?

Tell us your mount and dovetail standard and we will specify a saddle. Full warranty, shipped from Canada.