Price review SVBONY 2 inches 90 Deg Dielectric Mirror Diagonal for Astronomical Telescope with 1.25 inches Adapter
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| Brand | SVBONY |
| Objective Lens Diameter | 20 Millimeters |
| Item Weight | 18.67 Ounces |
- 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 Description
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%
Package Includes:
1 x 2" 90-deg Dielectric Mirror Diagonal
1 x 1.25" Dust Cover
1 x 2" Dust Cover
Internal brass ring
Internal brass ring that the set screw hits to hold your eyepiece inside for eliminates marks on your eyepiece barrel, can secure your valuable eyepieces
All metal stucture
SVBONY diagonal mirror are made of metal,hard and durable without worrying about damage during use
Light weight
SVBONY diagonal mirror weighs only 529g,that won't add excessive weight or bulk to your telescope
Use Both 2" (50.8 mm) and 1.25" (31.75 mm) Eyepieces
SVBONY diagonal mirror can Use Both 2" (50.8 mm) and 1.25" (31.75 mm) Eyepieces,can meet your different needs
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