Astronomy Specialist

TAKAHASHI TSA-120 APO TRIPLET

$5,438.00 USD
SKU: TK-TTK12010

Takahashi

Apochromatic triplet

120 mm

f/7.5

900 mm

6.7 kg


Style

 

 

The Takahashi TSA-120 is an apochromatic triplet refractor with exceptional correction for observation and astrophotography. With one S-FPL53 ED element, the air-spaced triplet lens cell provides similar performance to their flagship TOA series with a Strehl ratio of 99.2% at the optimal wavelengths of human vision.

The TSA-120 has a native focal length of 900mm and a focal ratio of f/7.5, making it the ideal instrument for capturing a wide range of deep sky objects. 

A selection of three different field correctors are available to suit different applications (sold separately). With the optional TOA-35RD focal reducer, the telescope is transformed into a highly corrected astrograph with a large 44mm image circle. In addition, a 1.5x focal extender is available, also corrected for full-frame sensors.

The rack and pinion focuser is smooth and accurate. For serious imaging, the Prima Luce Lab Esatto 3" robotic microfocuser is compatible with the additional PL3600296 adapterNOTE: Use of the optional focal reducers will likely require a custom adapter for the Esatto. Please contact us for more information.

Note: The OTA ONLY variant does not include tube rings or a dovetail bar. For the TSA-120, you can use the PrimaLuceLab 125mm PLUS tube rings in combination with the PrimaLuceLab 240mm Losmandy bar.

 

 

Spot diagram of Takahashi TSA-120 at prime focus.

 

 

Spot diagram of Takahashi TSA-120 with TOA-35 FL field flattener.

 

 

Spot diagram of Takahashi TSA-120 with TOA-35 RD 0.7x focal reducer.

 


 

Optical design Super apochromatic triplet with ED glass
Lens cell
Air-spaced triplet with 3 lenses in 3 groups, 1 x S-FPL53 lens in the centre
Coatings
Hard multicoatings
Objective diameter
120 mm
Focal length at prime focus
900 mm
Focal ratio at prime focus
F/7.5
Backfocus distance at prime focus
227.5 mm
Dew shield diameter 162 mm
Tube diameter 126 mm
Tube length 990 mm with dew shield extended, 870 mm with dew shield retracted
Tube weight 6.7 kg
SKU TTK12010

 

Prime focus focal length 900 mm
Prime focus focal ratio
F/7.5
Prime focus backfocus distance
227.5 mm
TOA-35FL flattener focal length
882 mm
TOA-35FL flattener focal ratio
F/7.3
TOA-35FL flattener backfocus distance
117.5 mm
TOA-35FL flattener image circle
40 mm
TOA-35RD 0.7x reducer focal length
672 mm
TOA-35RD 0.7x reducer focal ratio
F/5.6
TOA-35RD 0.7x reducer backfocus distance
62.5 mm
TOA-35RD 0.7x reducer image circle
40 mm
EXT-ED 1.5x extender focal length 1350 mm
EXT-ED 1.5x extender focal ratio F/11.3
EXT-ED 1.5x extender backfocus distance 117.5 mm
EXT-ED 1.5x extender image circle 44 mm

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TAKAHASHI TSA-120 APO TRIPLET.

TAKAHASHI TSA-120 APO TRIPLET

From $5,438.00 USD

Style

  • OTA Only
  • Complete Assembly

Optical design

Apochromatic triplet

Image circle

Focal ratio

f/7.5

Aperture

120 mm

Focal length

900 mm

Optical thickness

Threads

Cooled

Colour or Mono

Pixel size

Sensor dimensions

Resolution

Sensor diagonal

Quantum efficiency

Read noise

Fullwell capacity

Bit depth

FPS

Camera backfocus

Filter size

Filter size

Bandpass (FWHM)

Bandpass (FWHM)

Glass thickness

Mount type

Payload capacity

Latitude range

Dovetail saddle

Slew speed

Encoders

Periodic error correction

Counterweight shaft

Azimuth adjustment range

Internal diameter

Illuminated diameter

Compatible telescope external diameter

Weight

6.7 kg

Length

Width

Height

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