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Cyclops Optics

Takahashi TSA-120


Takahashi TSA-120

Shipping Weight:
11.00 KGS
In stock now! Shipping to designated regions only. Please contact us for details
Calculated at checkout

Product Description

TSA-120 is a Takahashi triplet super apochomat in a portable package. The triplet objective lens is made of two finest quallity crown and flint glass with an extra-low dispersion FPL-53 glass sandwiched in between. The triplets are air-spaced and thus no maintenance anticipation associated with oil-spaced glasses.

Takahashi TSA-120 is highly recommended for demanding visual observers for its colour free and eyes-bleeding sharp rendering. Astrophotograhers will also appreciate the great imaging performance when coupled with high quality Takahashi flattener and reducers.

OTA only option includes

  • TSA-120 tube assembly
  • 50.8 mm ocular adapter (70)
  • 50.8 mm extension tube (71L)
  • 50.8 mm sleeve (13)
  • Coupling (s) (14)
  • 31.7 mm ocular adapter (46)

* Ocular (eyepiece) (47) not included

OTA with tube assembly option includes

  • Everything above and,
  • 7x50 finderscope (TKA00552)
  • Finderscope bracket (TKA00563)
  • 125mm tube holder with aux. plate for FSQ-106ED and TSA-120 (TKA36420)

TSA-120 Default Configuration



System Chart


Optical system Triplets Apochromats
Aperture 120 mm
Focal length 900 mm
Focal ratio f/7.5
Resolution 0.97 arcseconds
Limiting magnitude 12.1
Light gathering power 293x
OTA length

990 mm (fully extended)
870 mm (contracted)

Weight 6.7 kg

With 35 Flattener

Focal length 880 mm
Focal ratio f/7.3
Image circle 40mm

With TOA-35 Reducer

Focal length 670 mm
Focal ratio f/5.6
Image circle 50 mm

With Extender ED 1.5x

Focal length 1350 mm
Focal ratio f/11.3
Image circle 44 mm


1 year warranty by Takahashi Japan.

We will take care of all technical problems occured during the 1 year period since the shipment date. We will cover the shipping, if required, to Takahashi Japan for repair or maintenance. Your only cost would be shipping it back to us which we will be very happy to allow you to use our heavily discounted (~30% off retail) courier account (FedEx). 

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