Takahashi E-180 - Epsilon 180mm ED Astrograph OTA

Takahashi E-180 - Epsilon 180mm ED Astrograph OTA
Item # TK-TEK0180
  • Hyperbolic Flat-Field Astrograph design offers up and amazingly fast effective focal ratio of f/2.8!
  • The Takahashi Epsilon 180ED catadioptric extra low dispersion optics provide high quality images for visual observation and large field imaging needs.
  • Wide, perfectly flat field supports traditional photographic formats as 24x36 (35mm), 6x6, 6x9 and works perfectly with mega pixel digital 35mm cameras and CCD imagers.
  • The Takahashi Epsilon 180ED newly designed corrector provides incomparable contrast and sharpness - combined with extreme accuracy.
  • Appreciably shorter exposure times reduce tracking error and produce 10 micron stellar images across the entire field.
  • The Takahashi Epsilon 180ED picks up faint details and nebulosity missed by slower instruments!


Little... Yellow... Different... Are you ready for a revolution in imaging? Then take a closer look at the Takahashi Epsilon180ED f/2.8 Hyperbolic Flat-Field Astrograph Telescope. This fast field photo visual astrograph is perfect for the new multi-mega pixel digital 35mm cameras and CCD imaging equipment - not to mention traditional film methods with a 35mm camera, too! The super fast focal ratio of f/2.8 not only means shorter exposure times, but picking up details normally invisible to slower focal ratio telescopes, such as faint extended nebulosity and details in galactic structure. Are you looking for that faint comet? You'll find it with the Takahashi Epsilon180ED... 

What makes the Tak Epsilon 180 Astrograph special? It's in the newly designed extra-low dispersion two element corrector housed in a rotating focuser assembly. No one knows optics like Takahashi and the ED design provides incomparable contrast and sharpness - combined with extreme accuracy. Not only is it a suitable visual instrument, but it's one capable of producing 10 micron stellar images across the entire super-flat field. The speed means your exposure times become a fraction of what they would once require to capture the image and that means even less chance of tracking errors or random chance affecting your astrophotography.

Super solid, heavy duty construction means transportable gear that won't lose its collimation. Its mechanical design quality, perfectly matched with its optics, give you set-up flexibility that's hard to match in other astrophotography oriented telescopes. Now you can make initial collimations and install your photographic equipment in advance - saving your precious dark time to concentrate on the essentials - to set your imaging process. This fast control of your telescope put the Takahashi Epsilon-180ED Astrograph ahead of its class and makes your experience a much more pleasurable one.

The low profile Crayford focuser has a rotary connector system for framing. It allows you the option of use when it comes to the ED corrector assembly and it can be removed if desired. A microfocuser (MEF-1) is available as an optional accessory. In place, the Crayford and corrector will yield a 44mm (1.7") flat field image circle, large enough to cover a 35mm sized CCD chip. The effective focal length of the Takahashi Epsilon 180ED Astrograph is 19.7" (500mm) and its metal back distance measures 2.2" (56mm). The perfect correction of field, covering the entire image circle, is shown in the spot-diagram . The diffraction pattern almost does not present a residue of coma in periphery. In the same way, the 4-lenses corrector practically does not generate any chromatism.

The Takahashi Epsilon-180ED Hyperbolic Flat-Field Astrograph telescope design isn't as strenuous on the user. Because it's not a high-resolution reflector, it is far less sensitive to collimation issues. Unlike the Cassegrain-style, it isn't necessary to perform a star collimation at every set-up. The primary mirror cell is supplied with three dual-action collimation screws that either push or pull. To keep flexure of the primary mirror under control during temperature change, there are also three screws with counter-nut adjustments to regulate the pressure on the primary mirror. What's more, you'll find there are reference marks on both mirror assemblies to ensure perfect alignment of the optical axis. Thanks to Takahashi, this simple system and its collimation eyepiece created for the Epsilon-180ED, means that critical adjustments are quick, slick and easy.

In the long run, you'll be very pleased with your choice of the Takahashi Epsilon180ED f/2.8 Hyperbolic Flat-Field Astrograph. You'll get a superior contrast image with pinpoint stars right out to the edge of the field. Despite being mainly a astrophotography-minded telescope, the Tak Epsilon-180ED will still give first rate performance as a large field optical instrument, too... with huge views of deep sky such the entire Andromeda Galaxy and its neighbors, the Lagoon and Trifid Nebula together, and much more. It's a comet sweeper and a keeper.... and the extraordinary possibilities of your astrograph are unlimited. Just refer to this useful system chart when assembling your imaging train, and it'll all fall neatly in place.

Takahashi Epsilon180ED f/2.8 Hyperbolic Flat-Field Astrograph Telescope Features

  • Dual action collimation screws, mirror tension adjustment and collimation marks make critical alignments fast and easy.
  • The low profile Crayford rack-and-pinion focuser has a rotary system for framing and provides 56mm of backfocus from the end of the corrector.
  • Extra-low dispersion two element corrector combined with hyperbolic primary mirror produces flat field images with no coma or chromatism.
  • 180mm effective aperture provides a light grasp of 661x at a limiting visual magnitude of 13.0 with an outstanding resolution factor of 0.64 arc seconds.
  • Focal length of 500mm and focal ratio of F/2.8 yield 44mm image circle - 60% not vignetted.
  • M54mm female thread photographic connector on the corrector (for wide T-mount) included.
  • Tube Dimensions: 570mm/22.4" (length) - 232mm/9.13" (diameter) - 22 lbs/10.7 kg (weight).
  • Five Year Manufacturer Warranty.

Takahashi Product Number: TEK0180

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 Epsilon
Optical Design Astrograph
Mount Type None - Optical Tube Only
Warranty 5 Year Warranty
Telescope Aperture 7"
Secondary Aperture N/A
Telescope Focal Length 500mm
Telescope Focal Ratio f/2.8
Back Distance 56mm
Image Circle 44mm
Image Across Field Not supplied by manufacturer
Optical Coatings Fully Multi-Coated
Limiting Stellar Magnitude 14
Highest Useful Magnification Not supplied by manufacturer
Optical Tube Outer Diameter 232mm
Length of Optical Tube 19.7"
Optical Tube Weight 22 lbs.
Tube Color or Finish Takahashi Yellow
Finder Included None
Eyepiece(s) Included None
Diagonal Included? No - Sold Separately
Dew Shield Included? No, Not Necessary
Dew Shield Outside Diameter Not supplied by manufacturer
OTA Mount Type N/A
Power Adapter Included None - Does Not Require Power
Objects in Database N/A
Alignment Procedure N/A
Mount Weight N/A
Total Telescope Weight N/A
Tripod Type Included None, Sold Separately

Customer Reviews 2 item(s)

Very nice telescope
I have this telescope for 2 years. I have made beautiful pictures with my Canon EOS 300D camera. Stars are perfect dots, also on the edges of the field. Extremely high quality optics!

f 2,8 means short exposuretimes with nebulae, starclusters and galaxies! The Pleiades fits on the image, very large field. The whole sword of Orion fits on the chip of my camera.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by Bob van Slooten NL / (Posted on 3/15/2010)
Takahashi E180ED f/2.8
This is the top of the line astrograph with small weight and 180mm of mirror but it's f/2.8. This amazing telescope can capture faint detail in half the time of a normal exposure. Well built and expert craftsmanship expected of Takahashi.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by John Downs / (Posted on 7/22/2007)
Included Items

Included Items

  • Takahashi Epsilon180ED OTA
  • M54mm Female Thread Photographic Connector
  • Low Profile Rack and Pinion Focuser
Questions & Answers

Product Questions

What about motorizing the focuser? Is that possible? If not directly possible can the stock focuser be exchanged for a motorized option not necessarily by the same manufacturer?
Is there enough backfocus to put a rotator on there with the camera?
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