Takahashi TOA-150B O.T.A.


  • 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
  • 7 to 1 fine focuser standard
  • 4" focuser w/camera rotator bearing allows 360 degree 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 degree 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.

*Suggested retail price of system as illustrated. This is for comparison purposes only. Please contact your authorized Takahashi dealer or Texas Nautical Repair Inc. for exact price and availability. All prices and specifications are subject to change without notice.*

SPECIFICATIONS for the TOA-150B (Tube assembly only)

Objective: 150mm triplet Ortho Apochromat
Focal Ratiof/7.33
Effective Focal Length 1100mm
Tube Diameter 179mm
Focuser 4 w/Camera Angle Adjuster and 10:1 Micro Edge Focuser

Effective Focal Length
[W/35 Flattener*]
Effective F-RatioF/7.2
Image circle 40mm

Effective Focal Length
[W/67 Flattener*]
Effective F-RatioF/7.3
Image circle 90mm

Effective Focal Length
[W/TOA Reducer *]
Effective F-RatioF/5.7
Image circle 50mm

Effective Focal Length
[w/ Super Reducer
Effective F-RatioF/5.5
Image circle 70mm

*35 Flattener can be sued with the Extender-TOA for flat-field high magnification observing
** Available October 2005

* Can be used with Extender-TOA for flat-field observing



Add to Cart:

  • Model: TOK1501
  • Shipping Weight: 90lbs
  • Manufactured by: Takahashi

This product was added to our catalog on Monday 29 August, 2005.