Takahashi E-160ED Bedienungsanleitung
Instruction Manual
TAKAHASHI
- 2 -
Thank you for purchasing the ε-160ED hyperbolic astrograph.
While on paper the specications of the ε-160ED look very similar
to the older ε-160, the optical performance is completely dierent.
Through improved design and exciting manufacturing precision,
the correction of aberrations has allowed Takahashi to achieve
a diffraction limited spot size of 3 microns over a 44mm image
circle. This helps make the ε-160ED the ultimate telescope for
astrophotography.
Please read this instruction manual thoroughly prior to use. This
will help you get the most out of your telescope. All products are
shipped only after a thorough inspection, but if you nd any defects,
please notify your Takahashi distributor immediately.
- 3 -
WARNING
CAUTION
Never look at the sun with an astronomical
telescope. The intense light and heat
present on the optical surfaces and at the
focal point can damage the telescope and
may result in a re.
Looking at the sun through a telescope will
cause instant and permanent blindness.
When mounting the telescope on an equatorial mount be careful
ی
not to drop the telescope or pinch your fingers or other body
parts. Injury may result.
When setting the telescope down, be careful not to set the
ی
telescope on an unstable surface. The telescope could fall,
resulting in damage to the telescope or bodily injury.
Do not place the product in direct sunlight. Accidentally pointing
ی
the telescope at the sun can result in intense heat at the focal
point and possible re.
Be careful not to pinch ngers when using the focuser.
ی
The telescope contains small parts that can be harmful if
ی
swallowed. Do not allow small children to be around the
telescope unsupervised.
The packaging contains flammable materials. Keep away from
ی
heat or re. Do not allow children to play with the plastic shipping
bag. Suocation could result.
DANGER
Warning & Caution
Please be mindful of the following safety precautions.
- 4 -
Table of Contents
Warning & Caution ------------------------------------------ 3
Table of Contents ------------------------------------------- 4
Specications ------------------------------------------------ 5
Tube Assembly Layout ------------------------------------ 6
About the Optical System --------------------------------- 7
Setup ----------------------------------------------------------- 8
Observation ------------------------------------------------ 15
Accessories ------------------------------------------------ 17
Optical Alignment ----------------------------------------- 18
Precautions for Photography --------------------------- 26
Care & Maintenance ------------------------------------- 27
System Charts --------------------------------------------- 29
- 5 -
Specications
Optical System ------------------------- Hyperboloidal Catadioptric
Eective Diameter --------------------- 160mm
Eective Focal Length ---------------- 530mm
Eective Focal Ratio ------------------ 1:3.3
Secondary Mirror Diameter ---------- 63mm
Corrector Lens -------------------------- 2 elements in 2 groups
Image Circle ----------------------------- φ44mm
Photographic Field --------------------- 4.8 degrees
Metal Back ------------------------------- 56.2mm
Diameter of Main Tube --------------- 204mm
Length of Main Tube Assembly ----- 580mm
Weight of Main Tube Assembly ----- approximately 6.9kg
Finder Scope ---------------------------- optional accessory
Focusing System ----------------------- Rack & Pinion (MEF-3 compatible)
Included -------------------------- Instruction Manual, Warranty Card,
3 Screws for primary mirror Installation,
Hex Wrench (2mm, 2.5mm, 3mm, 4mm)
- 6 -
Tube Assembly Layout
Bottom Ring
Oblique Mirror Optical
Axis Push Screw
Oblique Mirror
Optical Nut
Primary Mirror Back Cover
Set Screw x 3
Primary Mirror
Bottom Retainer x 3
Primary Mirror Optical Axis
Adjustment Screw x 3
Oblique Mirror
Spider
Cross Head
Screw x 3
Rotator Lock
Primary Mirror Cell
Adjustment Screw
Focus Lock
Focuser
Draw Tube
ε-160ED Corrector
ε-130D Visual Adapter
Coupling (S)
31.7 mm Eyepiece Adapter
Adapter Cap
Focuser Knob
Main Tube
Finder Base
Focuser Base
Top Ring
Cap
Primary Mirror
Primary Mirror Cell
- 7 -
The revolutionary Epsilon optical system uses a hyperbolic surface for the primary mirror,
coupled with a corrector in the focuser body. By combining a concave mirror and a convex
lens reducer system, the Petzval condition is achieved, resulting in a attened image plane.
Takahashi’s unique Epsilon optical system corrects the spherical aberrations and coma for
outstanding image quality.
About the Optical System
Epsilon Performance
ی
The Epsilon ε-160ED is a new product
that further evolves Takahashi’s unique
Epsilon optical system. The newly designed
double-lens correction lens is a new type
that pursues the aberration correction
required for modern imaging sensors, and
a diffraction-limited spot image is achieved
with a star image of 3 microns out to the
edge of a full frame sensor. The smallest
star image is about 1/10 the size of the older
ε-160. In addition, the distortion aberration
(distortion), which was a drawback of the
old correction lens, has been corrected to
less than half, which makes image mosaics
easier to compose. The ε-160ED’s 530mm
(f/3.3) specification, which has the highest
level of optical performance, combined with
the lightweight and compact body, make
it an astrophotography instrument that
allows you to enjoy the very best in Epsilon
performance.
Takahashi Mirrors
ی
Although it is generally considered very
dicult to polish hyperbolic primary mirrors,
Takahashi has developed this technology
and evolved the production into this modern
style.
Diagonal Oset
ی
In order to achieve maximum illumination,
the secondary must be offset from the
center of the optical axis to produce the best
possible illumination for the image. As the
speed of the optical system increases, so
does the offset. The oversized secondary
has been offset to produce the maximum
illumination for the image.
- 8 -
Balancing
ی
Attach any additional equipment, such as
camera and adapters, to the optical tube
assembly before balancing. It is best to
have the focuser pointing skyward when
balancing. Proper balance is important
to avoid damage to the telescope and to
reduce the strain on the mount gears and
motors when slewing and tracking.
Balance around the Declination Axis▼
Loosen the R.A. clamp and rotate the 1.
tube so that it is in the horizonal position.
If the R.A. balance is too far off, the
telescope may be dicult to move. In this
case, balance the R.A. axis rst.
While holding the telescope rmly, loosen 2.
the declination clamp slightly and check
the balance around the declination axis.
If the balance is not correct, loosen 3.
the tube ring locking nuts and slide the
telescope back and forth within the tube
rings until proper balance is achieved.
Once balance is achieved, tighten the
tube ring locking nuts.
Attaching the Tube holder
ی
(Tube holder and Plate are sold separately)
Attaching the telescope to an equatorial
mount will require the tube rings and
mounting plate. First, attach the tube rings
to the mounting, but do not tighten the
mounting bolts completely. This will provide
some play in the position of the tube rings.
Then, attach the bridge plate to the tube
rings, connecting the two tube rings on
the top. After the bridge plate is attached,
tighten the tube ring mounting bolts to
the mounting plate. Secure the mounting
plate to the Takahashi mount using the two
provide cap bolts.
With the tube rings open, carefully mount
the telescope in the tube rings. Once the
telescope is in place, close the tube rings
and secure them with the tube ring lock
nuts. With the lock nuts in place but not fully
tightened, balance the telescope on the
mount. Once proper balance is achieved,
tighten the lock nuts (Please see next
section on for more details on balancing).
(Note) The Takahashi mounting plate can
be used with the EM-11, EM-200 and EM-
400 mounts. If a third-party mount is used,
a proper mounting plate will need to be
obtained.
Setup
Cap Bolt
Washer
Tube Ring
Lock Nut
Mounting Plate
Equatorial Mount
Tube Rings
▼Balance around the R.A. Axis
With the declination axis balanced, rmly 1.
tighten the declination clamp.
Loosen the R.A. clamp and check the 2.
balance around the R.A. axis.
If the balance is not correct, move the 3.
mount balance weight up or down to
achieve proper balance.
If balance cannot be achieved with the 4.
weight at the extreme end (bottom) of the
shaft, additional weight may need to be
added.
- 9 -
Focusing System
ی
Focuser▼
ε-160ED adopts a rack and pinion system
that allows the focusing mechanism to
achieve best focus and enables speedy
operation. To focus, loosen the focus lock
and rotate the focusing knob until focus is
achieved. Please note that if you attempt to
focus with the focus lock engaged, you may
cause damage to the focusing gear or draw
tube.
(Note)
Please also refer to the section on imaging
•
for more information on focusing.
The size of the focus lock has been
•
increased to ensure that the draw tube
does not move during imaging. Therefore,
the distance between the rotator lock and
the drawtube lock is narrow. Use caution
when using to avoid pinching injuries to
ngers.
Corrector▼
The Epsilon optical system is designed
so that a good image can be obtained
by combining the primary mirror and a
corrector lens. These are meant to work
together, and the telescope should not be
used without the corrector. However, when
adjusting the optical axis, it is difficult to
make adjustments with the corrector in
place, so the corrector should be removed
to adjust the optical axis. When reattaching
the corrector after adjusting the optical axis,
be sure that it is screwed completely in, so it
does not come loose during imaging.
(Note)
The corrector for the ε-160ED is for the
•
ε-160ED only. It cannot be used with other
models such as the older model ε-160
because the aspherical coefficient of the
primary mirror is dierent.
Camera Angle Adjuster (CAA)▼
On the ε-160ED, the camera angle
adjuster is built into the focuser, allowing
rotation of the camera, making for easy
composition adjustments. To change the
image composition, loosen the rotator lock
and rotate the camera. When the image
is composed properly, tighten the rotator
lock. When rotating the camera, be sure
to hold the focuser body when turning so
that the threads attaching the corrector and
camera mount do not loosen. The rotator is
designed so that the focus does not change
due to this rotation, but this should be
conrmed after each rotation.
Telescope OTA
Rotator Lock
Focus Lock
Focuser Body
Draw Tube
Corrector
Rack Gear
Focuser Knob
Focuser Base
Focuser Base
Corrector
Pinion Gear
Focuser Knob
- 10 -
- 10 -
Visual Use
ی
While the ε-160ED is designed for
astrophotography, you can attach an
eyepiece and enjoy it as a wide-field
telescope for visual observation. To attach
an eyepiece, loosen the compression ring
and remove the eyepiece cap. Then insert
an eyepiece into the eyepiece adapter and
tighten the compression ring. If the eyepiece
cannot be inserted even after loosening the
compression ring, push the plastic ring
inside the compression ring with your ngers
to expand it. While all Takahashi eyepieces
have been conrmed to reach focus with the
ε-160ED, third party brands have not been
tested to conrm focus.
Eyepieces
ی
Takahashi sells the following types of
eyepieces. Each series is designed with
different features and capabilities so that
you can choose the eyepiece that is best for
your needs.
LE▼
LE eyepieces are high-quality eyepieces
that provide a wide field of view and a
wide variety of types from low to high
magnication. Available sizes: LE5 to LE30
in a 31.7 mm style, and LE40 and LE50 in
50.8 mm style. Note that 50.8 mm eyepieces
cannot be used with the ε-160ED.
ABBE▼
While the construction of Abbe eyepieces
has a short apparent eye-relief when
compared to more modern designs, they
provide good contrast and high performance
at a low cost. All Abbe eyepieces are a 31.7
mm style.
TOE▼
TOE eyepieces take full advantage of the
performance of the objective lens, and are
designed with priority to magnications and
eld of view suitable for observing the moon
and planets at high magnification. All TOE
eyepieces are a 31.7 mm style.
TAK-UW▼
TAK-UW are a series of ultra-wide-angle
eyepieces with an apparent eld of view of
90 degrees, while prioritizing the sharpness
of the star image. All TAK-UW eyepieces
are a 31.7 mm style.
Compression Ring
Eyepiece
Compression Ring Insert
Dieses Handbuch passt für folgende Modelle
1
Inhaltsverzeichnis
