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Summary of Contents for Takahashi e-130D
- Page 1 ε-130D Hyperboloid Flat-field Astrograph Instruction Manual TAKAHASHI...
- Page 2 The ε-130D has similar specifications to the original ε-130 with respect to the aperture and focal ratio with updated optics to take advantage of digital imaging. The image circle which will cover a full frame digital SLR has stars that are 10 μm or less in size. The ε- 130D for digital produces the same size stars as the ε-180.
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Page 3: Table Of Contents
CONTENTS Warning & Caution ------------------ 2 Specifications--------------------------3 Tube Assembly Layout --------------4 What is the ε-130D? ----------------5 Attaching Finder Tube Holder ----6 Focusing System----------------------8 Finder Alignment--------------------11 Observation---------------------------13 Photographic Accessories---------16 Optical Alignment-------------------17 Care and Maintenance------------- 25 System Chart--------------------------26 SPECIFICATIONS Optical System Hyperboloidal Catadioptric Effective Aperture 130 mm Effective Focal Length... -
Page 4: Tube Assembly Layout
Tube Assembly Layout Bottom Ring Finder Base Top Ring Main Tube Focuser Base Rotator Locking Screw Focuser Housing Focusing Knob Adjsting Screaw Drawtube Drawtube Loking Screw Secondary Mirror Primary Mirror Spider Primary Mirror Cell Pull Screw Push Screw Blank Screw x3 Primary Mirror Adjusting Screw x3 - 4 -... -
Page 5: What Is The Ε-130D
A hyperbolic primary with a ■Takahashi Mirror Making Technology flat –field corrector can produce a field Takahashi has been producing hyperbolic that is also free from spherical aberration mirrors about 30 years. They have and coma. This system is called the ε... - Page 6 Attaching the Finder and Tube Assembly The ε -130D can be equipped with optional 6x30 and 7x50 finders. If purchased with the scope the finders are Cap Bolt shipped in a separate box with the OTA. Washer following instructions assemble and attach the finders. Finder Base ■Attaching the Finder Attach the finder bracket using the 5 mm...
- Page 7 ■Attaching the Tube Holder ■Balancing Attach the tube holder to the M-plate with Place the ε -130D into the holder and the bolts provided and do not tighten tighten the clamps to the point where the them too tightly, but center the holder in telescope is held, but still can be slide the bracket.
- Page 8 430mm focal length allows for wide field viewing if desired. A 31.7 compression visual adapter is included as standard equipment with theε- 130D. Takahashi manufactures the LE, UW and Abbe Series 31.7 eyepieces all of which Pinion Gear Focusing Knob can be used on the ε-130D...
- Page 9 ■Oculars The following oculars are available from Eyepiece Adapter (31.7) Takahashi. Use them in the best way. ●LE Oculars Eyepiece A wide selection of wide field oculars are available from 5mm to 50mm focal length. LE5, LE7mm: Alternativelyφ31.7 mm and φ24.5 mm LE10, LE12.5, LE18, LE24, LE30mm:...
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Page 10: Focusing System
■Focusing After inserting the imaging package the ●Focus Clamp ε-130D can be focused using the focus A focuser clamp is included with the knobs, MEF fine focuser or electronic focuser to lock the focuser when precise focusing system attached to the focuser, has been achieved and loosen to change the focus . -
Page 11: Finder Alignment
Alignment Screw The Takahashi finder uses an interrupted crosshair which is designed to allow the easy centering of an object to be photographed or observed. The wide field... - Page 12 ◆Adjusting Screw Procedure ◆Replacing The Battery 1. Turn all the lock nuts until they reach Before changing the batteries in the the head of the alignment screws. illuminator, please be certain to turn it 2. In order to move the crosshair in the off.
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Page 13: Observation
Observation ■Cool Down ◆Prime Focus imaging The ε -130D uses an oversized φ 166 The ε -130D is designed to be used at mm primary which requires a cool down f/3.3 and consequently has a very narrow period for the temperature of the primary depth of field;... - Page 14 ◆Filters When a filter is used such as the 48mm for the wide mount adapter or any other filter, the spacer should by shortened by 1/3 the thickness of the filter because the introduction of the filter into the light path has increased the glass path distance by 1/3 the thickness of the filter used...
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Page 15: Photographic Accessories
Photographic Accessories Dedicated accessories are available for attaching a camera to the ε-130D ■Wide Mount Camera Adapters DX-WR Camera Mount DX-WR Takahashi wide-mount camera adapter is designed to take full advantage of a fully illuminated 35mm frame. It is φ... - Page 16 Collimation of the ε-130D The ε -130D is precisely collimated before shipment. In the event it is received decollimated, contact your local dealer to arrange for return for proper collimation. In time it might become necessary, after continual use, to recollimate the telescope. The collimation procedure is explained below ■...
- Page 17 ■ Preparation of Telescope Collimating Mark on Primary Using the collimating eyepiece and collimating tube will be a great help in Collimating Mark on Secondary collimating theε-130D. The collimating tube has a provision for the insertion of a crosshair. Use nylon thread pulled together taught and our small pieces of tape to score the crosshair.
- Page 18 ■Secondary Mirror Operation 1. Turning the Secondary Mirror Loosen the large securing knurled nut which holds the secondary mirror assembly to the spider slightly by turning it counter-clockwise. This will allow the secondary mirror to be turned in either direction and then tightened by turning the nut clockwise.
- Page 19 ④ Insert the collimating eyepiece and tilt the secondary mirror until the dot on Sleeve the surface in over the center of the cross hairs. In the illustration Fig. C-7, the Opening View of the Collimating center of the collimating eyepiece Eyepiece matched the center of the crosshair, but Fig.
- Page 20 Loosen and turn the secondary holder. Then, tighten it lightly by hand Fig. C-10 Turn the secondary holder. Push Fig. C-11 Crosshairs of collimating tube ⑥ In this process the center of the reflection of the collimating eyepiece Center circle of the collimating eyepiece has been shifted off center as seen on the Fig.
- Page 21 ◆Collimating the Primary Mirror ⑦As you look through the collimating Noting the location of the circle on the eyepiece you will notice that the circle surface of the primary in the image of on the primary mirror is not centered on the collimating eyepiece, adjust the the reflection if dot on the surface of the primary mirror.
- Page 22 Remember the width of the secondary holder (side ◆Adjusting the Primary Mirror of the secondary holder) ⑧It is best to have the ε-130D on the mount pointing as close to straight up as possible to use gravity to make certain that the movement of the mirror will be permanent and it will ensure that the cell is seated properly.
- Page 23 Repeat the above process. Then make certain the following. ◎ The center reflection collimating eyepiece is in the centered on the crosshairs of the secondary mirror mark. ◎ The primary mirror mark is in the centered cross point of four spiders. ◎...
- Page 24 The fast optical system such as ε-130D is unacceptable for the reference star guide error. Prepare the strong mount and the precise guide telescope. You are available for Takahashi GT-40 and α - SGR3. ◆Other Notification After deciding the composition of the picture, tighten the Camera Rotator Clamp.
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Page 25: Care And Maintenance
Care and Maintenance ◆Primary and Secondary Mirror tube and blow out the dust by a hand When they get dew on their surface power blower. Should it get dirt or during observation or when they get fingerprint on the lens, wipe it gently moisture on the mirror after the scope is with a swab moistened with lens cleaner, brought into warm room from cold... - Page 26 - 26 -...
- Page 27 <<Memo>> - 27 -...
- Page 28 TAKAHASHI SEISAKUSHO Ltd. 41-7 Oharacyo Itabashi Tokyo, 174-0061, Japan PHONE: +81-3-3966-9491 FAX: +81-3-3966-9424 - 28 -...
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