Like the TSA-120, which has exactly the same optics, the TSA-120FT is equipped with a triplet apochromatic ED lens with a diameter of 120mm and an aperture ratio of F/7.5, arranged in a 3-group cell is mounted. The latter ensures good stability of the opto-mechanical chain in the face of the usual transport constraints and in the event of significant fluctuations in the temperature of use. It is equipped with a retractable dew shield.
The lens was developed to achieve a very high level of performance in observation and photography. The chromatic aberration in short wavelengths (blue and violet) is reduced by a third compared to the old FS-102/FS-128 with fluorite lens. The Strehl ratio at optimal wavelengths of human vision is almost perfect at 99.2%, which is the same as the TOA series.
The TSA-120 is therefore a light, compact and economical refractor with performance similar to that of the TOA, Takahashi’s flagship models and among the best in the world.
This TSA-120FT version replaces the original focuser with a Starlight Instruments Feather Touch 3.0″ model, engraved “Made for Takahashi” and equipped with a 1/10 microfocus. Customization has been optimized to keep the accessory mounts the same as the original version. The oversized focuser enables robust assemblies with large cameras and filter wheels.
The addition of the optional field corrector enables native focus imaging. The TOA-35 Reducer (F/5.25) makes it more comfortable in deep sky photography. All assemblies meet the rigidity and flexibility requirements of new imaging devices such as digital and CCD cameras of the latest generation.
CHF 2'500.00
