Mounting system

DuoScope

The cleverest mounting system.

Mount your secondary telescope or camera directly on the counterweight bar. The equipment itself does the balancing — no extra counterweights needed, less total weight, more flexibility.

DuoScope
The idea

Turn the counterweight bar into a mounting rail

The weight you add can be the weight you save.

In a conventional setup, a guide scope or camera rides on top of the primary telescope. This raises the centre of mass and requires more counterweights to compensate — adding weight to fight weight.

DuoScope reverses this logic. The secondary instrument attaches to the counterweight bar on the opposite side of the mount, acting as its own counterweight. The result: the system balances with less metal, the total assembly weighs less, and the mount is less stressed.

Five interchangeable configurations cover single telescopes, dual telescopes, camera-only and mixed setups. Any configuration converts to another through available accessories — you keep your investment as your needs change.

Why it works

  • Secondary equipment counteracts primary scope — no added ballast
  • Total system weight can be lower than a conventional setup
  • Less weight = less strain on the mount and motors
  • Quick installation and removal for transport
  • Fine orientation adjustment on all models (±9° dec, ±6° elev)
  • Modular: any configuration converts to another with accessories
  • Available for 18mm and 20mm counterweight shafts
  • Custom shaft sizes available on request
Configurations

Five models, one system

All DuoScope models share the same bar-mounting principle and are interchangeable through accessories. Choose the configuration that fits your current workflow — and change it later if you need to.

Swivel / VX

DuoScope Swivel

Attaches a telescope or camera to the end of the counterweight bar with full fine-positioning controls: ±9° in declination and ±6° in elevation. Available in standard and Vixen dovetail versions.

Foundation model
One-T

DuoScope One-T

Holds a single telescope (50–80mm aperture) using rings, with adjustable positioning along the bar. Ideal for adding a guide scope alongside your main imaging instrument.

Two-T

DuoScope Two-T

Mounts two telescopes simultaneously on the counterweight bar, leaving the main telescope free. Run parallel observation sessions, imaging and guiding, or two independent instruments at once.

Most versatile for imaging
One-C

DuoScope One-C

Positions a single camera — including heavy telephoto lenses — anywhere along the counterweight bar. The adjustable mounting point lets you fine-tune balance without moving counterweights.

Mix

DuoScope Mix

Combines telescope and camera attachment in one assembly, with independent balance adjustment for each. The most versatile configuration for astrophotographers running a scope and a camera simultaneously.

Most versatile overall
Specifications

Technical details

Compatibility

Counterweight shaft18mm & 20mm (standard)
Custom shaft sizesAvailable on request
Telescope aperture (One-T)50–80mm
Dovetail variant (Swivel)Vixen standard

Adjustment range

Declination adjustment±9°
Elevation adjustment±6°
Bar positioningAdjustable along full bar length
Configuration changeVia accessories, no full replacement
Documentation & purchase

Get the DuoScope