Northmere Scarp dual-arm alt-az mount, head only

Specifications

Description

The Scarp dual-arm mount is an alt-azimuth mount for refractors, short-tube reflectors, and ED binoculars on a tripod, rated for up to 8 kg. Two arms support the altitude axis on either side of the head, so the load is spread across a wider bearing than in single-arm designs. That reduces flex when you move the tube and keeps the view steadier at higher magnification. You aim the mount by hand in altitude and azimuth, the way you would point a camera.

Slow-motion rods on both axes allow fine corrections without touching the telescope. Each rod drives a fine-pitch gear, so a single turn moves the tube by a small fraction of a degree. Tension knobs on the altitude and azimuth axes set how freely the head moves. Tighten them for a firm hold in wind, or loosen them for quick sweeps across the sky. The mount has no motors, so you follow drifting objects by hand. That is manageable at low and medium power and at moderate magnification.

The saddle is a dual dovetail design that accepts bars up to 100 mm wide. A safety screw holds each bar while you tighten the main clamp. The head weighs 6.4 kg and has a standard 3/8-16 thread on its base for photo tripods and pier adapters. Keep the total load, including the tube, diagonal, eyepiece, and finder, well below the 8 kg rating, because heavier loads take longer to settle after focusing. Use a tripod rated for the same load so the setup stays steady.

Because the mount has no tracking, it suits visual sessions and daytime nature observing rather than long-exposure imaging. Setup takes a few minutes once the tripod is level.

About this configuration

Each configuration of the Northmere Scarp dual-arm alt-az mount uses the same mount head; the options change what it stands on and what ships with it. This configuration is the mount head alone, so you supply a tripod or a pier with a matching top plate. Buying the head only makes sense when you already own a sturdy tripod or a permanent pier in the garden. This configuration ships without extra add-ons, so the box holds only the mount and its support.

A white mount head is easy to see in the dark, which helps you avoid walking into the tripod. The 2026 edition carries the mechanics over unchanged and updates small parts such as the knobs and covers. Check the saddle type in the specifications against the dovetail bar on your telescope before you choose a configuration.

What's in the box

• Dual-arm alt-azimuth mount head with dual dovetail saddle
• Two slow-motion control rods
• Accessory tray

Compatibility notes

• Accepts dovetail bars up to 100 mm wide.
• The 3/8-16 base thread fits most photo tripods and pier adapters.
• Suits refractors and reflectors up to about 150 mm aperture and 6 kg for steady visual use.
• Not designed for tracking or long-exposure imaging.