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...
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
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
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.
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.
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.
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
- 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.
|Name||Takahashi - Epsilon 180ED f/2.8 Hyperbolic Flat-Field Astrograph OTA
|Manufacturer Part No
|Secondary Mirror Obstruction by Diameter
||(minor axis) 80mm