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The TSA series is a member of Takahashi’s line of triplet refractors. In the TSA design, an ED glass lens is placed between two lenses, with air spacing in between. The resulting system achieves a high level of apochromatic performance for both visual observation and imaging.
The TSA-120 is a 120 mm apochromatic f/7.5 refractor with a focal length of 900 mm. It features a retractable lens hood and a 2.7 inch rack and pinion focuser. The TSA is compatible with several flatteners, reducers and extenders, including the TOA-35 Reducer, which converts the telescope to a f/5.3 imaging platform with a 44 mm image circle.
Optical Tube Assembly only (mount, tripod, tube holder and finder sold separately).
900 mm, 882 mm with TOA-35 Flattener, 672 mm with TOA-35 Reducer
f/7.5, f/7.3 with TOA-35 Flattener, f/5.6 with TOA-35 Reducer
40 mm with TOA-35 Flattener or Reducer
2.6° with TOA-35 Flattener, 3.4° with TOA-35 Reducer
230 mm, 117.5 mm with TOA-35 Flattener, 83.7 mm with TOA-35 Reducer