Takahashi TSA-120 Triplet Fluorite APO Refractor

The Takahashi TSA-120 is equipped with an air-spaced ED triplet apochromatic lens with 120 mm diameter (900 mm focal length and F/D 7.5), mounted in a 3-element barrel. The latter ensures good stability of the optomechanical chain in the face of usual transport constraints and significant variations in operating temperature. It has a retractable dew shield and the length of the tube does not exceed 990 mm for a moderate weight of 6.7 kg.

The lens has been designed to achieve a very high level of performance in observation and photography. The chromatic aberration in short wavelengths (blue and violet) is reduced by one 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%, equivalent to that of the TOA series.

The TSA-120 is therefore a lightweight, compact and economical refractor, whose performance is similar to that of the TOA, Takahashi's flagship models and recognized as among the best in the world.

Technical Specifications

• Optical design: ED Triplet Super Apochromat
• Lens cell: Air-spaced triplet 3 lenses/3 groups. 1 S-FPL53 ED lens in the center
• Coatings: Hard multicoatings
• Diameter: 120 mm
• Focal length: 900 mm
• Focal ratio: F/7.5
• Metal back distance: 227.5 mm
• Length of the optical tube: 990 mm (870 mm with retracted dew shield)
• Diameter of the optical tube: 125 mm
• Diameter of the dew shield: 160 mm
• Weight: 6.7 kg
• Focuser: Rack-and-pinion (Feather Touch focuser version available)

TTK12000 includes:TSA-120 tube assembly complete D-120mm F-900mm F/8
Triplet Super Apochromat with retractable dew shield
TTK12010 TSA-120 (OTA) tube only with 50.8/31.75 adapter
TKA00552 Finder 7 X 50
TKA00563 Finder bracket
TKA36420 tube holder

TTK12010 includes:
TSA-120 (OTA) tube only with 50.8/31.75 adapter
Retractable dew shield

TTK12050 includes:
TTK12050 TSA-120 Feather Touch (OTA) tube only with 50.8 adapter
Retractable dew shield.