TAKAHASHI TSA-120
* Apochromatic Triplet *
* Another Beautiful refractor from Takahashi *
TSA-120 on my old EM-10 Mount
Note that the TSA-120 is much much lighter than the TOA-130, and even lighter than the legendary FS-128. The new EM-11 mount can easily take this instrument, including any camera, filter wheel and auto-guider.
The TSA-120 does not come with a microfocuser as standard, so if you want that option, please specify and we will include at special price.
Specification
Objective aperture 120mm
Focal length 900mm
Focal ratio f/7.5
Triplet super apochromat
Coating: broadband multi-layer, anti-reflective
2"/1.25" ocular adapters as standard
Retractable dewshield
Integral zero backlash microfocuser
Overall length - 990mm
Weight - 6.7Kg
Optional items (see end of main price list for full list)
Field Flattener
Focal length 882mm
Focal ratio f/7.3
Image resolution 7microns rms spot radius from on-axis to 20mm radius off-axis
Image circle 40mm (60% illumination)
Field 2.6 degrees
Focal Reducer
Focal length 672mm
Focal ratio f/5.6
Image resolution: 4 microns rms spot radius on-axis
6 microns rms 10mm spot radius off-axis
13 microns rms spot radius 20mm off-axis
Image circle 40mm diameter (60% illumination)
Field 3.4 degrees
SYSTEM CHARTS - Click to enlarge
