Takahashi TOA-150B Double ED Triplet Refractor w/ EM-400 Temma II Mount

Takahashi TOA-150B Double ED Triplet Refractor w/ EM-400 Temma II Mount
Item # TK-TSS1501
  • Ortho-Apochromatic Triplet Lens incorporates front and rear ED FPL-53 glass elements to eliminate chromatic aberration.
  • 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.
  • Outstanding resolution of 0.77 arc seconds and limiting visual magnitude of 13.4 at 1100mm focal length and f/7.33 focal ratio.
  • The Takahashi EM 400 Mount supports an 85 lb.load, includes illuminated polar finder and EM-400 Wooden Tripod.
  • Package includes Double-Ring Tube Holder, L-Plate, 10:1 Micro Focuser, 7X50 Finder with Bracket & Quick-Release, 2"/1.25" Compression Ring Ocular Holders & 1.25" Compression Ring Diagonal, 7.5mm and 18mm LE 1.25" Eyepieces.


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 - along with Scopeguard finder quick-release.

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!

About the Takahashi EM-400 Mount

The new EM-400 Temma II mount has been developed to fill the gap between the NJP and EM-500 mount. It has been designed to carry an 85 lb. load. The Takahashi EM-400 mount disassembles into three sections: The R.A./Dec assembly, the base assembly, and the counterweight shaft. This reduces the heaviest part to 49 lbs (22.3kgs), which is lighter than the weight of the NJP equatorial head. This makes transportation and set-up easier.

What's more, the entire mount rotates 360º on it's base for easier set-up, and allows the tripod to be set in the most secure position. All of the cables attach to the underside of the Dec. housing and the use of internal encoders allows the mount to be used without having the cable wrap around in inconvenient positions. The 8kg. counterweights use two lock screws for more secure attachment to the counterweight shaft.

The Takahashi EM-400 mount uses the highly accurate EM-200 computing reticle with an 11X eyepiece to allow three arc minute polar alignment to the celestial pole. This reticle is useable until the year 2040. The EM-400 is a dual-voltage mount that will operate on either 12 volts (500X sidereal) or 24 volts (500X sidereal). The Temma II system is compatible with The Sky and other popular software using the free ASCOM and Linux drivers. This mount can be used anywhere in the world with a latitude adjustment from 0º to 50º in either hemisphere.

Specifications For Takahashi EM-400 Mount

  • Type German Equatorial Mount
  • R.A. slow-motion Motor driven
  • DEC. slow-motion Motor driven
  • Azimuth adjustment ± 10° with rotary base plate
  • Elevation adjustment with ML altitude wedge: 0° to 50° with HL altitude wedge : 15° to 58° (default version for Europe)
  • Polar finder / Accuracy - Built-in / 2' - 4.4 degrees
  • R.A. setting circles accuracy No setting circles
  • DEC. setting circles accuracy No setting circles
  • Encoders Included
  • Weight Main block : 22.5 kg
  • Altitude wedge : 5.2 kg
  • Total weight (with counterweight shaft) : 29.5 kg
  • Counterweights 2 x 8kg
  • Maximal loading capacity 35 kg (without counterweight)
  • Optimal loading capacity 20 kg (without counterweight)
  • Operating voltage 12V / 24V DC - 12v DC only for high speed operation
  • Power consumption @12VDC : 0.5/0.7A (NS, sidereal rate and tracking speed) ; 1.6A (HS, pointing speed) @24VDC : 0.4/0.9A (NS, sidereal rate and tracking speed) ; 1.4A (HS, pointing speed)
  • Standby mode : 0.1A
  • Tube mounting Flat base with 4 x M10 et 2 x M8 screws
  • Mounting capacities Tube rings, plates and dovetail mounting plates
  • R.A. axis diameter (material) 40 mm (steel)
  • R.A. worm gear shaft diameter (material) 20 mm (steel)
  • R.A. gear diameter (material) 150 mm/180 teeth (bronze)
  • DEC. axis diameter (material) 40 mm (steel)
  • DEC. worm gear shaft (material) 20 mm (steel)
  • DEC. gear diameter (material) 150 mm/180 teeth (bronze)
  • Type Temma-2
  • Stepper motor accuracy 50 pps
  • Slow motion speeds R.A. : 0.1x to 1.9x sidereal rate
  • DEC. : ± 1.5' to 13.5' (by increment of 1.5'/sec) High speed mode 12V. : 500x sidereal rate (R.A.), ± 1°/sec (DEC.) 24V. : 500x sidereal rate (R.A.), ±2°/sec (DEC.)
  • Worm gear shaft cycle 8 minutes
  • Tracking accuracy ± 5"
  • Autoguiding SBIG compatible (mini-DIN PS2 connector)
  • PC connectivity RS-232C serial port (with S-VHS to DB-9 cable)
Included in the package is the EM-400 Wooden Tripod. This long, fixed-height wood tripod includes an accessory tray and its height from the ground to the base of the declination assembly is 56.69" (1440mm) when set up. The length of the tripod legs measures 50.39" (1280mm) and its height at set up is 43.70" (1110mm). If that weren't enough, be sure to include Takahashi's own Double-Ring Tube Holder, L-Plate, 10:1 Micro Edge Focuser, 7X50 Finder with Bracket and Quick-Release, 2"/1.25" Compression Ring Ocular Holders & 1.25" Compression Ring Diagonal, 7.5mm and 18mm LE 1.25" Eyepieces, too.

Takahashi Product Number: TSS1501

Photo shows a TOA-150 on the EM-400 Mount with Metal Tripod The tripod in this package is made of wood. Click on "Images/Links" tab to see more pictures of the EM-400 mount and OTA.

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 Equatorial - Motorized
Warranty 5 Year Warranty
Telescope Aperture 5.9"
Secondary Aperture N/A
Telescope Focal Length 1100mm
Telescope Focal Ratio f/7.33
Back Distance 275.0mm
Image Circle ø1.6" (40mm)
Image Across Field Not supplied by manufacturer
Optical Coatings Fully Multi-Coated
Limiting Stellar Magnitude 13.3
Highest Useful Magnification Not supplied by manufacturer
Optical Tube Outer Diameter 179mm
Length of Optical Tube 38"
Optical Tube Weight 42.7 lbs.
Tube Color or Finish Gloss White
Finder Included 7 x 50 Optical Finder
Eyepiece(s) Included 7.5mm LE, 18mm LE
Diagonal Included? No - Sold Separately
Dew Shield Included? Yes
Dew Shield Outside Diameter Not supplied by manufacturer
OTA Mount Type N/A
Power Adapter Included DC Cable with Alligator Clips
Objects in Database N/A
Alignment Procedure EQ North Align, EQ South Align
Counterweights Included SEE CODE 27*** SEE CODE 27***
Mount Weight 65 lbs.
Total Telescope Weight Not supplied by manufacturer
Tripod Type Included Adjustable with Steel Legs

Customer Reviews 1 item(s)

Nice Scope
Very nice planetary scope, Saturn and Jupiter are something else. Moon is super crisp, is super sharp with Televue 8mm.. Mount is heavy ( I take it out 4-5 times a week for star parties but works great. Have not done astro photography so I cannot speak to that.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by Roland Fields / (Posted on 11/22/2011)
Included Items

Included Items

  • TOA-150 OTA
  • 4" Heavy Duty Focuser
  • 360º Camera Adapter
  • 2" Threaded Eyepiece Accessory Holder
  • 1.25" Compression Ring Eyepiece Accessory Holder
  • Retractable Dew Shield
  • EM-400 Mount
  • J-L Tripod
  • Double-Ring Tube Holder
  • L-Plate
  • 10:1 Micro Edge Focuser
  • Finder Quick Release
  • 7X50 Finder
  • Finder Bracket
  • 7.5mm LE Eyepiece
  • 18mm LE Eyepiece
  • 1.25" Compression Ring Diagonal
  • Encoders
  • Drive Motors
  • Cables
  • Hand Controller
  • Computing Reticle
  • 11X Reticle Eyepiece
  • Counterweights
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