I used this with my Tak GT40 guidescope was so much easier than using rings
$350 pickup or post
US$347 at highpoint scientific
Baader Stronghold Tangent Mount Assembly
The Baader Stronghold Tangent Mount Assembly is a very compact but stiff two-dimensional head, with micro adjustments which can hold a maximum load of up to 7 kg. It allows precise stable adjustment for guiding.
The Baader Planetarium Stronghold Tangent Mount Assembly is used for guiding scopes, viewfinders, and telephoto lenses as a piggy-back mounting system. The Stronghold Tangent Assembly is very compact but with a stiff, two-dimensional head with micro adjustments which can hold a max load of up to 7 kg. Whether you want to fix a guidescope to the main telescope or attach viewfinders to the existing telescope, the Stronghold Tangent Mount Assembly makes it possible to do so.
The Top panel has a 1/4" screw nad 6St M6 threaded hole, with a recommended thread depth of 6mm. Included in the Stronghold Tangent Mount Assembly base plate is a 3/8" to 1/4" photo thread, 1/4" photo screw for camera/spotting scope attachment, EQ (Orion type) / GP (Vixen Great Polaris) dovetail clamp, and an additional lever for firm screw tension.
Stronghold Tangent Mount Assembly Specifications
Color: Black
Weight: 680g
Material: Aluminum, hard anodized
Loading Capacity: 7kg
Azimuth Adjustment: +/- 23-deg, elevation: +/- 35-deg
Length: 115mm (knobs included)
Width: 128mm (knobs included)
Height: 54mm (without EQ clamp)
Mounting Options for Top: 1/4" photo thread, 6pc. M6 threads
Mounting Options for Base Plate: 1/4" and 3/8" photo threads, 4pc. M6 and 4pc. M5 threads
General Mounting: EQ-clamp (Vixen Standard) included, can be mounted on top or on base
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