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Takahashi FSQ-106ED main features

The modified Petzval design of the FSQ-106ED, with the field flattener integrated inside the tube, makes it possible to cover all the photographic formats, from 35mm SLR/DSLR to 6x7 cameras. Its photographic image circle of 88mm of diameter (field of 9,5°) does not have an equivalent on the market of the refractors of 100mm of aperture. CCD users will be able to dream with the use of large sensors without risk of vignetting or loss of definition in edge of field. As it is the tradition inside Takahashi company, the objective is entirely collimatable in order to compensate for the possible mechanical and thermal stresses. A perfect image is at this price.

Optics of exception goes of course with mechanics of exception. To replace the traditional camera angle adjuster, Takahashi integrated an oversized rotative rack-and-pinion focuser in the design of its optical tube. This device offers a perfect rigidity to all the types of photographic assembly, even the heaviest. Voluntarily limited, the rack-and-pinion course is controlled by a double system of focusing including a 1/7 microfocuser.
The optical tube assembly is equipped with a retractable dew shield, to gain in volume.

Resolutely directed towards astrophotography, the FSQ-106ED has very many accessory assemblies including visual ones. It has a 186mm backfocus, which will charm the most demanding users. For examples of assembly, please see system-charts.
Even though this refractor is compact, it is quite heavy (125mm of diameter for a weight of 7 kg). Association with the EM-200 equatorial mount is ideal, including with a guidance system TGM in parallel. Many hardware configurations are available to optimize this astrograph and to turn the astrophotography of the deep sky into a moment of pleasure.