Stardiagonal Mirror & Prism

The mirror diagonal allows the use of large 3" eyepieces on very long focal length telescopes to achieve a large field of view.

• Connection telescope side - 3" barrel
• Connection eyepiece side - 3" receptacle with ring clamp
• Clamping of 3" accessories by using knurled screws
• Adapter for 2" with ring clamp is included in the scope of delivery

SV188P 90 Degree Dielectric Mirror Diagonal 99% Reflectivity for Refractor Telescope

• Dielectric coatings; super flat mirror with dielectric coatings to reduce reflected light loss; provide an over 99% reflective surface; good for astronomical viewing;
• The 1.25-inch nosepiece fits 1.25-inch telescopes and accepts standard 1.25-inch filters, eyepieces, Barlow lenses, and similar accessories; The 2-inch nosepiece is compatible with 2-inch telescopes and accommodates standard 2-inch filters and accessories. You can choose either 1.25inch or 2inch diagonal based on your requirements;
• 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.