SVBONY SV188P Telescope Diagonal 1.25" 90 Degree Mirror 99% Reflectivity | Upright Image, Brass Compression Ring

• Dielectric coatings; super flat mirror with dielectric coatings to reduce reflected light loss; provide an over 99% reflective surface; good for astronomical viewing
• 1.25 inches nosepiece fits 1.25 inches telescopes; accepts standard 1.25in filters; eyepieces; Barlow lenses and other accessories with a 1.25in insert barrel
• 90 degree viewing angle; diagonal reflects the telescope’s light path 90 degree to provide a more comfortable viewing angle; best for observing objects overhead
• Correct upside down and left right reversed image; the view image is upright; but left and right reversed if use the 90 degrees to your telescope
• Brass compression ring; Built in brass ring and thumbscrew accessories avoid eyepiece to rotate during adjustments; effortless fixes more firmly and will not scratch your eyepieces barrels

• Attach to Telescope — Loosen the thumbscrew on your telescope's focuser. Slide the 1.25-inch barrel of the SVBONY SV188P diagonal into the focuser until it sits snugly. Tighten the thumbscrew gently to secure the diagonal.
• Insert Eyepiece — Loosen the brass compression ring on the side of the diagonal. Insert your chosen 1.25-inch eyepiece, filter, or Barlow lens into the diagonal's barrel. Tighten the brass compression ring firmly but carefully to hold the accessory in place.
• Focus and Observe — Point your telescope at your desired celestial object. Look through the eyepiece in the diagonal and adjust your telescope's focuser until the image is sharp and clear. The 90-degree angle provides a comfortable viewing position.

Typical situations where SVBONY SV188P Telescope Diagonal 1.25" 90 Degree Mirror 99% Reflectivity | Upright Image helps — illustrative scenarios, not customer reviews.