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Takahashi e-130D, Instruction Manual

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Takahashi e-130D Instruction Manual Download Page 18

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■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.  When  the 
securing nut is loosened, loosen the nut 
very  sparingly  to  allow  the  secondary 
mirror to be turn, but not too loose. 
2.

 

Moving the secondary mirror 

Loosening the large knurled knob some 
distance  will  allow  the  secondary  to  be 
move up or down in a parallel fashion for 
better collimation. 
3.

 

Tilting the Secondary Mirror 

There are three screws with locking nut 
provided  to  allow  the  secondary  mirror 
to  be  tilted  for  collimation.  In  order  to 
tile the secondary mirror, it is necessary 
to  loosen  the  lock  nuts.  Loosen  each 
slightly to prevent the secondary mirror 
from moving too much. 
◆Aligning the Secondary Mirror 
①  Turn the crosshair of the collimating 
eyepiece  so  that  one  set  of  lines  is 
parallel a he ground which would make 
the second set of lines is parallel to the 
optical  axis  of  the  tube  which  would 
make  the  secondary  set  of  lines 
perpendicular.  The  diagonal  holder  is 
provided  with  three  tilting  screws  with 
lock  nuts  to  allow  the  secondary  to  be 
tilted  for  precise  collimation  Make 
certain that the telescope is pointing at 
the  white  card  or  a  window  with  a 
translucent curtain on it. In the event the 
secondary  is  rotated  out  alignment 
follow  the  next  step.  One  set  of  lines 
parallel to the optical axis of the tube. 
②  Loosen the large knurled nut holding 
the threaded rod of the secondary mirror 
holder and turn the secondary. 
③  Rotate  the  secondary  until  your  eye 
reflected in the diagonal as it is centered 
in  the  crosshair.  When  the  reflection  of 
your  eye  in  centered  in  the  crosshair, 
slightly tighten the knurled nut. 
                                                                       

                                                                     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Loosen and Turn. 

Then tighten it   

by hand secondary 

Collmating Mark on Secondary 

Collmating Mark on Primary 

Summary of Contents for e-130D

Page 1: ...1 ε 130D Hyperboloid Flat field Astrograph Instruction Manual TAKAHASHI ...

Page 2: ...l dealer WARNING NEVER POINT THE TELESCOPE TOWARDS THE SUN OR VIEW THE SUN THROUGH IT THIS WILL CAUSE INSTANT BLINDNESS OR SERIOUS DAMAGE TO THE EYE THIS TELESCOPE IS AN ASTROGRAPH AND IS MEANT TO BE USE AT NIGHT ONLY CAUTION When attaching the telescope to a mounting carefully place the tube into the tube holder and tighten the tube clamp The telescope should be placed on a flat surface like a ta...

Page 3: ...ffective Aperture 130 mm Effective Focal Length 430 mm Effective Focal Ratio 1 3 3 Secondary Mirror Diameter 63 mm Corrector lens 2 element Image Circle φ44 mm Photographic Field 5 9 degrees Metal Back 56 mm Diameter of Main Tube 166mm Length of Main Tube Ass y 460 mm Weight of Main Tube Ass y 4 9 kg 10 8 lbs Focusing System Rack Pinion correspondence with MEF 3 Standard Accessory This Instruction...

Page 4: ...ing Screaw Focuser Base Focuser Housing Focusing Knob Tube Assembly Layout Drawtube Rotator Locking Screw Drawtube Loking Screw Push Screw Secondary Mirror Primary Mirror Spider Blank Screw x3 Pull Screw Primary Mirror Cell Primary Mirror Adjusting Screw x3 ...

Page 5: ...tor did not have the ability to cover a full frame image like the ε 130D does The Effective Focal Ratio of f 3 3 produces a 5 9 image at 430mm The OTA weighs only 10 8 lbs and is perfect to transport anywhere in the World The ε 130D is a high performance optical system Takahashi Mirror Making Technology Takahashi has been producing hyperbolic mirrors about 30 years They have improved their product...

Page 6: ...arallel as possible to the tube assembly when the finder bracket screws are tightened around the finder This will make alignment easier 7x50 Finder Insert the finder for an infinity target during the day and lock the rear screws with the lock nuts and make certain that the front set of screws are in firm contact with the body of the finder Note that the chrome screw near the eyepiece is removed to...

Page 7: ...cing Place the ε 130D into the holder and tighten the clamps to the point where the telescope is held but still can be slide forwards or backward for balance Then unlock the Dec clamp but hold the telescope with one hand for safety Balance the tube assembly and lock the Dec clamp and then attach all the equipment to be used to the tube Turn the tube to place the imaging equipment in the direction ...

Page 8: ...allows 360 rotation of the imaging camera This rotator permits precise framing of any image Loosen the rotator locking clamp to allow the focuser to rotate and tighten this lock when the desired framing is achieved When using the camera angle adjuster have a firm grip on the imaging package as it is moved Visual Use The ε 130D at f 3 3 due to the large size of the secondary can be used with eyepie...

Page 9: ...D is suited to lower magnification observation The usage of these eyepiece should be the finder adjustment These sleeve size can alternatively employ φ 31 7 mm and φ24 5 mm TAK UW This eyepiece appearance field of view is about 90 degrees The special feature is the sharp star image in all the field of view The sleeve size can employ φ31 7 mm Abbe This simple eye piece is quad lens lower ghost high...

Page 10: ...cise Focusing System When the focus knob is turned in the direction of the arrow the draw tube will move out and will move in when the knob is turned in the opposite direction Refer to the illustration below Focus Clamp A focuser clamp is included with the focuser to lock the focuser when precise has been achieved and loosen to change the focus Drawtube Locking Clamp Drawtube Focusing Knob Drawtub...

Page 11: ...ant that the finder and the telescope be in alignment The following procedure can be used to align the finder Alignment Procedure 1 Place a low power eyepiece in the telescope and center a bright star in a convenient part of the sky Do not forget to engage the motor drive to keep the star centered If this procedure is done in daylight use an object that is at least one mile away Loosen the lock nu...

Page 12: ...l reticle illuminator If an illuminator will be installed remove the cap screw at the end of the finder and install the reticle illuminator The illuminator makes the centering of dim objects easier In order to turn the illuminator on turn the knob clockwise The knob will click when the illuminator turns on As the knob is turned the reticle will brighten Adjust the knob to the desired brightness Tu...

Page 13: ...h will cause vignetting of the field caused by an oversized exit pupil Astro Imaging Critical focus must be achieved to produce a flat field image with pinpoint stars the ε 130D was designed to produce This critical focus should be checked with each new image Prime Focus imaging The ε 130D is designed to be used at f 3 3 and consequently has a very narrow depth of field this is a principle of opti...

Page 14: ...nt adapter or any other filter the spacer should by shortened by 1 3rd the thickness of the filter because the introduction of the filter into the light path has increased the glass path distance by 1 3rd the thickness of the filter used 48 mm filter Camera Mount DX WR ...

Page 15: ...l advantage of a fully illuminated 35mm frame It is φ 55 mm so as not to cause vignette of the image circle produced by the ε 130D This wide mount adapter is available for Nikon Cannon and other brands by request MEF ３ Optional Accessary The optionally available MEF 3 8 to 1 micro focuser can be attached to the ε 130D for more precise focusing of the image Camera Mount DX WR 1 8 Micro Focuser Knob...

Page 16: ... ε 130D TKP69005 Coupling S TKP00103 Eyepiece adapter 31 7 TKP00101 Allen Wrench 2 0 mm Allen Wrench 2 5 mm Allen Wrench 3 0 mm Allen Wrench 4 0 mm Optional Tool at extra cost Collimating Tube 31 7 TKA00442 Collimating Eyepiece TKA00441 Flathead Screwdriver Adjustable Wrench capable of 14 mm hexagon headed bolts Lock the camera angle adjuster knob and then remove visual adapter and then the correc...

Page 17: ...This will make pointing and leveling the OTA and pointing it towards the light source simple If you lose your orientation to the movement of the secondary mirror place your finger over the opening of the tube to regain your orientation The directions of the field of view correspond to the numbers 1 through 4 on the illustration Adjusting the Secondary Mirror The secondary mirror can be tilted for ...

Page 18: ...mirror from moving too much Aligning the Secondary Mirror Turn the crosshair of the collimating eyepiece so that one set of lines is parallel a he ground which would make the second set of lines is parallel to the optical axis of the tube which would make the secondary set of lines perpendicular The diagonal holder is provided with three tilting screws with lock nuts to allow the secondary to be t...

Page 19: ...loosen the push screw A B C after backing off the lock nuts Loosen the large knurled nut in the center and tighten the push screw A B and C Refer to the Figs C 8 and C 9 Now the center dot of the secondary has been shifted below the center of the crosshairs It then becomes necessary to tilt the secondary using screws A B and C to center the dot on the secondary mirror with the center of the crossh...

Page 20: ...crew A Now the center reflection if the collimating eyepiece is centered over the crosshairs as well as the center dot on the secondary mirror Loosen and turn the secondary holder Then tighten it lightly by hand Turn the secondary holder Push Fig C 10 Fig C 11 Crosshairs of collimating tube Secondary mirror center dot Secondary mirror Outside edge of collimating eyepiece This side is wider due to ...

Page 21: ... that the three collimating screw sets are labeled counter clockwise A B and C Please study the illustration of the cross section of the collimating screw sets The illustration shows the pull screw which is the screw at the center with the large slotted knurled head the lock nut and the push screws The push screw is adjusted by loosening the lock nut and turning the push screw with the 14 mm open ...

Page 22: ...e pull screw and all of the locking nuts with 14 mm wrench Check the image after this is done to make certain that the adjustment has been locked in place Now turn the focuser with the Camera Angle Adjuster As seen in the Fig C 13 the crosshairs will orbit around the center dot on the secondary mirror Therefore further fine adjustment are required Look from top side Look from bottom side This side...

Page 23: ...tar and looking the image It will indicate if the collimation is spot on If not make fine adjustments and subsequent images to test collimation until it is perfect 1 Picture Test Because above collimating adjustment you can find out a small optical axis error don t mind the over or under focused image We recommend the real picture test of star If you look at the coma abbreviation around the pictur...

Page 24: ...ly take a picture for the best focusing around your home This focusing is suitable for using effectively time at the good observation point Reference Star Guide for Photography 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 de...

Page 25: ...harp edge of the secondary mirror can be chipped by a shock on it Be careful in handling Corrector Lens Never take out the corrector lens from its cell It is very difficult for amateur to align the lens to keep its right performance and doing so will make warranty void If the lens surface gets dust take out the assembly from draw tube and blow out the dust by a hand power blower Should it get dirt...

Page 26: ... 26 ...

Page 27: ... 27 Memo ...

Page 28: ... 28 TAKAHASHI SEISAKUSHO Ltd 41 7 Oharacyo Itabashi Tokyo 174 0061 Japan PHONE 81 3 3966 9491 FAX 81 3 3966 9424 ...

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