GOWE New 2" 90-deg 99% Dielectric Mirror Diagonal for Telescope With 1.25" adapter

GOWE New 2" 90-deg 99% Dielectric Mirror Diagonal for Telescope With 1.25" adapter

• Excellent Quality Dielectric Diagonal; Mirror Star Diagonal - 99+% Reflectivity! If you paid for high performance coatings for your telescope, why lose 8% of your light using a standard diagonal? 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; The mirror has a 1/10th wave flat optical glass surface. The housing is machined from solid aluminum. The barrel is 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). We have these available for SCTs. If you paid for expensive high performance coatings on your SCT or Refractor,
• a dielectric diagonal is especially important. A standard aluminized diagonal has about 92% reflectance. And this decreases with time as the aluminum mirror surface ages. 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%.
• 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 - even very expensive ones. That is like having a slightly larger telescope!