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Takahashi - TOA-150B Refractor Optical Tube Assembly - Heavy-Duty 4" Focuser

Model#: TOK1501

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Availability: In stock


Manufactured by: Takahashi


Takahashi TOA-150B Refractor Optical Tube Assembly

*Tripod and mount shown in image not included

  • New design 150mm triplet Ortho apochromat
  • Extremely high order of color correction, absolutely color free images
  • Highly portable with a retractable lens shade, compact tube
  • 10 to 1 fine focuser and finder quick release standard
  • 4° focuser w/camera rotator bearing allows 360° rotation without losing focus
  • Optional f/5.5 Super Reducer for medium format CCD cameras and large chip digital SLRs
  • Oversized tube for superior baffling
  • Knife edge baffles for extremely high contrast images
  • Enhanced back focus to allow the use of any combination of CCD camera, filter wheel, binocular viewer or 2° diagonal



The TOA-150 is the second Takahashi Ortho Apochromat to be developed by Takahashi. It features a newly designed triplet objective. This new design like its smaller companion the TOA-130 is absolutely color free.

The 179mm oversized tube was used to provide superior baffling and extremely high contrast. Knife edged baffles inside the tube help provide this great contrast.

The high contrast and total lack of color makes the TOA-150 not only an outstanding optical instrument, but it can be used to make outstanding images with a CCD, digital SLR or film camera. Framing the image or placing the ocular in a convenient position is made simple because of the built-in camera angle adjuster that allows the 360° rotation of the camera or ocular without loss of focus.

The smooth heavy duty retractable lens shade allows the length of the TOA-150 to be reduced to 38° for easy transport to remote sites.

Attaching the Extender TOA converts the 150 into and f/11.68 planetary instrument capable of very high magnification images. It maintains the color correction and flattens the field.









Additional Information

Name Takahashi - TOA-150B Refractor Optical Tube Assembly - Heavy-Duty 4" Focuser
Manufacturer Takahashi
Model TOK1501
Focal Length 1100mm
Focal Length w/ flattener 1080mm (with 35 flattener)
Focal Ratio f/7.33
Focuser 4° w/Camera Angle Adjuster and 10:1 Micro Edge Focuser
Objective 150mm triplet Ortho Apochromat
Tube Diameter Ø179mm