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

Manufacturer model: FW2733A

  • 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


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%

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

  • Shipping and Handling

    We will ship for free to anywhere within the 48 contiguous United States.

    Please allow 5-7 business days for the package to arrive, regardless of buyer location within the US.

    We will provide an online tracking number to you once the item has been shipped.

    It may take a few business days for our automated system to process the tracking number onto eBay. However, this will not affect the shipping times.

  • Return Policy

    All our products are brand new and sealed. All items qualify for returns within 30 days of receipt.

  • Feedback

    We take our reputation seriously. If you have any questions or concerns, please contact us and we will respond back to your message within 24 hours.

Filed under: Eyepieces & Accessories