Takahashi TSA-120 (OTA) APO Triplet Refractor
 Takahashi TSA-120 (OTA) APO Triplet RefractorTakahashi TSA-120 (OTA) APO Triplet Refractor 

Takahashi TSA-120 (OTA) APO Triplet Refractor

  (2 Reviews)
✓ 2 year warranty


2x in stock shipped 1-2 working days

About this product

Model:  tak_ttk12010
Part Number:  TTK12010

The TSA 120 is a medium sized highly portable superior quality APO Refractor.

It features a multi coated triplet lens with a middle element from FPL53 and two high quality Crown elements.

The premium optics deliver superior performance for both lunar/planetary and deep space viewing and astrophotography.

The short 28" tube (with retractable dew shield) weighs only 5.7kg, making it one of the most portable larger aperture premium refractors available.

A range of Correctors and Reducers are also available that convert the TSA120 into a powerful Astrograph. 


  • Aperture - 120mm
  • Focal Length - 893mm
  • Focal Ratio - F7.5
  • Tube Diameter - 125mm
  • Outside Dew Shield Diameter - 160mm
  • Tube Length - 28"
  • Tube Weight - 5.7kg




What's in the box

Whats In The Box

OTA Only

  • TSA120 Optical Tube with Retractable Dew Shield and 50.8/31.75 EP Adaptor

OTA Package

  • TSA120 Optical Tube with Retractable Dew Shield and 50.8/31.75 EP Adaptor
  • 7x50 Finderscope
  • Tube Holder

Customer reviews

Average Rating (2 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Takahashi TSA-120
06 September 2022  | 

The telescope came in a few days to the USA. Great service again from FLO with quick shipping and great communication. I always look to do business with a company I can trust. Thank you for a beautiful telescope!

Rating (max 5):  
Best 120mm triplet - very high quality Japanese refractor ☆☆☆☆☆
19 September 2019  | 

Got one of these earlier in the year. Optically it is absolutely superb, probably the best 120mm triplet made. No trace of chromatic aberration at all. TSA stands for Triplet Super Apochromat, and it is just that.

For a 120mm triplet, this refractor is lightweight and my Skytee 2 mount is not strained. Maybe a Marmite thing, but I like the sliding dew shield on the "S" model.

Like all Takahashi telescopes it came triple boxed & in immaculate condition. For use the cooling down time is longer than that of my 120mm doublet, but not dramatically so. The views, allowing for aperture, of planets and anything else is breathtaking. I use a combination of Pentax XW and Baader Morpheus eyepieces, with an APM 30mm Ultra Flat Field for richer field views.

This telescope can handle views to at least 250x easily, probably more but I have not gone over that, yet.

There are cheaper very good Chinese refractors, but the Takahashi TSA120 is king of 120mm, with a well established and reported history of excellence.


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