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Diagonals & Accessories

7 Items
Takahashi 1.25" Eyepiece Holder

Takahashi 1.25" Compression Ring Ocular Adapter - TKP00101

SKU: TAK-TKP00101
  • The 1.25" Ocular Adapter is for 1.25" eyepieces and diagonals.

  • Takahashi has designed the adapter a two-point compression ring and chrome set-screws.

  • One side will thread into the 2" opening of the Coupling S Adapter from Takahashi.

  • The provided 1.25" sleeve will accept a 1.25" diagonal or eyepiece.
$89.00
 
Takahashi Coupling S - TKP00103

Takahashi Coupling S for Visual - TKP00103

SKU: TAK-TKP00103
  • On the telescope side, this adapter will connect to TKP86005 Visual Adapter or the 50.8 mm Sleeve from Takahashi.

  • One the other side, the Coupling S will connect to the 1.25" Ocular Adapter, which will then accept a 1.25" diagonal or eyepiece.

  • Takahashi's TCE0100 Collimating Scope will thread onto this adapter, which then connects to the focuser drawtube.

  • Using this adapter with the collimating scope will let you use the scope with Tak refractors that have a focal length of at least 1000 mm.
$52.00
 
Takahashi 50.8mm Sleeve - TKP00113

Takahashi 2" Sleeve to 1.25" Adapter - TKP00113

SKU: TAK-TKP00113
  • This sleeve adapter connects to the Coupling S on the eyepiece side.

  • On the telescope side, the sleeve adapter connects to the 2" Eyepiece Holder or the 50.8 mm Extension Tube.

  • This part serves as an alternative for the TCN0055 adapter.

  • With this sleeve you can connect the 1.25" Ocular Adapter, view through a 1.25" eyepiece, or insert a 1.25" diagonal.
$47.00
 
Takahashi 10th Wave 2" Diagonal

Takahashi 1/10th Wave 2" Diagonal with 1.25" Adapter - TKA00543

SKU: TAK-TKA00543
  • Diagonal Type: Mirror Diagonal
  • Diagonal Size - Eyepiece Side: 2" Barrel
  • Diagonal Size - Telescope Side: 2" Barrel
  • Includes Eyepiece Adapter: Yes, 2" to 1.25"
  • Optics Type and/or Coatings: Enhanced Aluminum Coatings
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$540.00
 
Takahashi 1.25" Prism Diagonal

Takahashi 1.25" Prism Diagonal - TKA00547

SKU: TAK-TKA00547
  • Diagonal Type: Prism Diagonal
  • Diagonal Size - Eyepiece Side: 1.25" Barrel
  • Diagonal Size - Telescope Side: 1.25" Barrel
$147.00
 
Takahashi 2" Ocular Adapter TKP27110

Takahashi 2" Eyepiece Adapter - TKP27110

SKU: TAK-TKP27110
  • This adapter threads directly to 2.7" focuser and will then accept a variety of accessories.

  • When looking at a system chart, this adapter is #70.

  • The adapter is black in color.

  • Takahashi has made this adapter for the Takahashi FS-102, FS-128, FS-152, FSQ-106, TOA-130N, and 130F series telescopes.
$177.00
 
Takahashi Short 2" Visual Adapter

Takahashi 2" Visual Adapter - TKP27110S

SKU: TAK-TKP27110S
  • One side of the Visual Adapter threads onto the 8L Coupling from Takahashi.

  • The other side of the adapter accepts a variety of adapter and accessories.

  • This adapter is compatible with Takahashi's Sky 90.

  • It can be used with the FSQ-85, and FSQ-106EDX when certain accessories are used in conjunction.
$177.00
 

A star diagonal is a useful astronomy accessory because it allows viewers to look through their telescope perpendicular to the direction the telescope points or at a 45° angle. This makes diagonals handy for terrestrial observations as well. The people at High Point Scientific understand that the comfort and convenience of using a star diagonal is important to you, that is why we offer many different types of telescope diagonals for you to choose from. You will find the latest brands offering a variety of diagonals, including mirror, dielectric, and prism diagonals.


As the name suggests, mirror diagonals use a mirror to turn the telescope’s image at a 90° or 45° angle. This creates an image that is correctly oriented vertically but reversed horizontally. The mirror is typically made of silver or aluminum, both of which scratch easily. You will need to careful when cleaning and using your mirror diagonal. However, mirror diagonals are often very affordable which makes them a favorite among amateur astronomers.


Many astronomers prefer mirror diagonals but wish they were more durable. That’s why High Point Scientific also offers dielectric diagonals. Dielectric diagonals are mirror diagonals but include enhanced dielectric coatings for greater durability and reflectivity. These coatings make dielectric diagonals hard and sturdy so it is much more difficult to scratch or mar mirror surfaces.


Prism diagonals are often considered the most innovative design for a diagonal. They use a glass prism that often produces higher reflectivity than mirror or dielectric diagonals. This means that prism diagonals suffer minimal light loss to give you high contrast celestial views. Be sure to look for Amici prism diagonals on the High Point Scientific website, as these produce an upright image with a correct left-right view for low-powered eyepieces.

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