The Takahashi GT-40 guiding scope can be used without an adjuster, by mounting it directly on a dovetail or on a cradle; the field of view is large enough to always find a star to guide on. However, direct mounting may not be trivial depending on the mount chosen.
So, Takahashi offers a simple L-shaped bracket for mounting the GT-40. Two oblong holes offer a few degrees of adjustment, when parallelism between the guide scope and the main tube is required. The centre-to-centre distance of the mounting holes is 35 mm.
