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SVBONY 2 inches 90 Deg Dielectric Mirror Diagonal for Astronomical Telescope with 1.25 inches Adapter


If you paid for high performance coatings for your telescope, why lose 8% of
your light using a standard diagonal We list our dielectric coated diagonals
at 99% reflectance, but this does not tell the complete story. While the
reflectance is at a little more than 99% for the deep violet and reds, the
reflectance for a the rest of the spectrum is essentially 100% Features: 100%
Brand New and Never Used High glossy finish appearance Threads fit standard
1.25'' and 2'' filters Excellent Quality Dielectric Diagonal Provides a
Comfortable 90 Degree View from your Refractor Fits Standard 2" (50.8 mm)
Diameter Focus Tubes Can Use Both 50.8 mm and 31.75 mm Eyepieces Has a non-
marring brass compression ring to secure your valuable eyepieces Material:
Metal Color: Black Net Weight: 529g/18.67oz Package Includes: 1 x 2" 90-deg
Dielectric Mirror Diagonal 1 x 1.25" Dust Cover 1 x 2" Dust Cover


  • Excellent Quality Dielectric Diagonal; Mirror Star Diagonal - 99% Reflectivity;Provides a Comfortable 90 Degree View from your Refractor; Fits Standard 2" (50.8 mm) Diameter Focus Tubes; Use Both 2" (50.8 mm) and 1.25" (31.75 mm) Eyepieces
  • New 2" 90 deg 99% Dielectric Mirror Diagonal for Telescope With 1.25" adapter; full metal;has a 1/10th wave flat optical glass surface;solid aluminum housing;threaded to accept standard 2" filters;The 2" eyepiece holder uses a non-marring brass compression ring to secure your valuable eyepieces. The 1.25" adapter also has a non-marring brass compression ring
  • Both sizes of eyepieces may be used and are protected from dings and scratches that would result from a standard set-screw. This 2" diagonal works with any Refractor that accepts a 2" star diagonals. It can also be used with Schmidt-Cassegrain or Maksutov-Cassegrain with an optional 2 inch visual back (See below)
  • Dielectric diagonal is especially important;A standard aluminized diagonal has about 92% reflectance;And this decreases with time as the aluminum mirror surface ages
  • For the vast majority of the visible spectrum;the reflectance does not vary more than about 0.1% below 100%;And the dielectric surface does not age like aluminum;This combination leads to the equivalent of a little more light grasp compared to standard diagonals

Product Details:

  • Product Dimensions: 1 x 1 x 2 inches
  • Item Weight: 1.35 pounds
  • Shipping Weight: 1.35 pounds
  • Handling

    We will ship all orders within 1 business day of payment.

  • Delivery

    We Do Not Ship P.O BOX AND Outside of the Continental US.

  • Return Policy

    All items qualify for returns within 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged.

  • Feedback

    We take our reputation seriously, we buy and sell online, so we understand the value of trust. If you are unsatisfied with your order, please contact us and we will work with you to resolve it to your satisfaction.

Filed under: Eyepieces & Accessories