Takahashi GT-40 Guidescope

Starting Price: $437.00
Price as Configured: $437.00
Brand: Takahashi / SKU: TA-TGT04000

Guiding in astrophotography may require the installation of a secondary telescope in parallel with the main instrument. For this purpose, Takahashi has designed a specific accessory, very close to a classic finder scope: the GT-40 guiding scope. Its very short focal length, 240 mm, allows a large field of view which facilitates the search for a guiding star.

The GT-40 has a 31.75 mm eyepiece holder, which is compatible with all commercially available autoguiding cameras. The image on the camera is focused by rotating the GT-40's lens cell with a thumbwheel. The metal back distance behind the refractor can therefore vary from 0 to 21.5 mm, depending on the needs of camera's backfocus.

It is possible to mount the GT-40 directly on Takahashi cradles and plates. Indeed, the steady rest has 2 sets of 2 tappings with 35 mm centers, with M8 and M5 threads. A Kodak thread (1/4"-20) is available in the center of the mounting plate for users of other brands. However, it is recommended that M5 and M8 threads are used to avoid unintentional rotation of the mount on its base. 

Bottom plate 2 x M8 threads + 1 Kodak 1/4"-20 thread
Top plate 2 x M5 threads
Eyepiece holder 1.25" (31.75 mm)
Length 272 mm (with dew shield)
Width 58 mm
Heigth 64 mm
Weight 570 g
Focuser Rotation of the front lens cell

Price as Configured: $437.00

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