Takahashi TOA-150B Double ED Triplet Refractor Telescope - Heavy-Duty 4" Focuser

Takahashi TOA-150B Double ED Triplet Refractor Telescope - Heavy-Duty 4" Focuser
Item # TK-TOK1501
  • The Takahashi TOA-150B features a new 4" focuser that uses a long stroke linear bearing designed to support a heavy instrument package. The focuser uses a trigger lock focus lock and new pinion assembly.
  • The Ortho-Apochromatic Triplet Lens of the TOA-150B incorporates front and rear ED FPL-53 glass elements to eliminate chromatic aberration.
  • The Takahashi TOA-150B Refractor Telescope provides 1100mm focal length and an f/7.33 focal ratio, which can provide a 90mm image circle and a photographic field of 3.5 degrees for unvignetted imaging.
  • For superior light transmission and excellent contrast, all surfaces are fully multi-coated with multiple layers of antireflection materials and the tube interior is knife-edge baffled.
  • Offers an outstanding resolution of 0.77 arc seconds and limiting visual magnitude of 13.4.
  • Five year Takahashi Warranty.


Takahashi TOA-150B - 5.9" f/7.33 Ortho-Apochromat Triplet Refractor Telescope

The Takahashi TOA-150B employs a newly designed triplet using special elements to produce the highest order of color correction. Orthoscopic means perfected visually and Apochromatic means you're free from those strange violet glows which often accompany bright stars or planets. Thanks to the ingenious design of layering an FPL-53 Extra-low Dispersion glass element between two extreme quality crown and flint elements - perfection ensues. And what's more, it's air spaced, so there's no oil between the elements to leak or become opaque with age. The lens cells are durably constructed to withstand transport - yet are fully able to be collimated should the owner wish to make adjustments. With 1/12th wave accuracy and an airy-disc Strehl ratio of 0.992, the optics on the Takahashi TOA-150B Ortho-APO are as near to perfection as you can get!

The Takahashi TOA-150B Ortho-APO is a dream come true for those who want to use a medium format camera. It includes a newly designed 4" focuser that uses a long stroke linear bearing designed to handle heavy instrument packages with ease. LIke the FSQ-106ED, the focuser on the TOA-150B uses a trigger lock focus lock and has a new pinion assembly. A camera angle adjuster is included, and enables the observer or astrophotographer to turn the ocular or camera 360 degrees to better view or frame an object to be photographed. The 4" focuser, coupled with the optional dedicated flattener, will produce a fully usable 90mm diameter image circle. But that's not all. The focuser itself offers a generous 225mm of backfocus to allow the use of additional accessories, like adding on color filter wheels, etc. What's more, the focuser itself offers "no slip" stability with dual knobs for ease of use, 10:1 Micro Edge Focuser and 2" threaded eyepiece/accessory holder with 1.25" compression ring eyepiece holder also supplied.

The Takahashi TOA-150B Refractor is perfect for visual, CCD and classic astrophotography. The f/7.3 focal ratio with a 1100mm focal length is long enough for high magnification observations of the Moon and attaching the optional Extender TOA converts the TOA-150 APO into a f/11.68 planetary instrument capable of very high magnification. You'll get images which display.the high order of color correction of the Ortho-Apochromat Series without saturated color and, thanks to the numerous knife-edged baffles, it displays amazing contrast - all packaged in a short, 38" tube with the dew preventive lens shade retracted that weighs just under 43 pounds. It even has an optional convenient handle at the rear - located just before the focuser - which will allow for an easy grip for carrying and setting up the optical tube.

Takahashi quality... Through and through!

Takahashi Product Number: TSA0150

Photo shows a Takahashi TOA-150B OTA with optional viewfinder, bracket, and handle.

Important Note: Takahashi America requires that their telescope optical tube assemblies be shipped via 2nd Day Air or faster in order for the full warranty to be in force. Please make sure you choose the appropriate shipping method in your shopping cart or, if you speak to an OPT associate, request 2nd Day Air or faster. If you are purchasing a telescope and mount package or any accessories to accompany an OTA, please contact OPT for a shipping quote, since only the OTA is required to ship second day air but all other products can be shipped separately via any other available shipping method. Thank you!
Additional Information

Additional Information

Manufacturer Takahashi
Telescope Series Takahashi TOA
Optical Design Refractor - Apochromatic
Mount Type None - Optical Tube Only
Warranty 5 Year Warranty
Telescope Aperture 150mm
Secondary Aperture n/a
Telescope Focal Length 1100mm
Telescope Focal Ratio 7.33
Back Distance 275.0mm
Image Circle 1.6x = 1.3°
Optical Coatings Fully Multi-Coated
Limiting Stellar Magnitude 13.4
Highest Useful Magnification 479x
Optical Tube Outer Diameter 179mm
Length of Optical Tube 990mm
Optical Tube Weight 20kg
Tube Color or Finish Gloss White
Finder Included None
Eyepiece(s) Included None
Diagonal Included? No - Sold Separately
Dew Shield Included? Yes
OTA Mount Type N/A
Power Adapter Included None - Does Not Require Power
Objects in Database N/A
Counterweights Included None
Mount Weight N/A
Total Telescope Weight N/A
Tripod Type Included None, Sold Separately

Customer Reviews 1 item(s)

Perfection and craftsmanship.
I have enjoyed the previous run of TOA-150's and now the " B " version,it's really hard to find anything wrong with this scope it is simply that good.The only thing that can match this is a new Astrophysics telescope and that will require a 10 year wait or some incredible long wait time on a list.
I get to enjoy perfection in the now every night .
A must buy product if you like perfection and incredible craftsmanship .
The optics are as good as you can buy,the color correction is amazing and even more so when imaging.
Truly a work of art made by superb passionate technicians and opticians.
Their price consistently increases with time,a well worth investment.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by SlcStarman / (Posted on 7/15/2015)
Included Items

Included Items

  • Takahashi 150mm f/7.33 Ortho-Apochromat Triplet OTA
  • 4" Heavy Duty Focuser with Built-in Camera Angle Adjuster
  • 10:1 MicroEdge Focuser
  • Retractable Dewshield
  • 2" Threaded Eyepiece/Accessory Holder
  • 1.25" Compression Ring Eyepiece Holder
Questions & Answers

Product Questions

What is the weight of the TOA 150 with the equipment described in the offering?
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