We've given our 2" dielectric mirror diagonal a new twist -- literally! With its twist-tight clamping mechanism, the Orion 2" Dielectric Twist-Tight Mirror Star Diagonal presents a significant upgrade from typical thumbscrew-equipped diagonals. A simple clockwise twist of the diagonal's knurled red aluminum collar precisely centers any inserted eyepiece or accessory and holds it securely in place.
The innovative twist-tight mechanism keeps your valuable eyepieces free of pesky thumbscrew scratches, and also provides a more secure grip than thumbscrew-equipped diagonals. You'll especially appreciate the Orion 2" Dielectric Twist-Tight Mirror Star Diagonal when using a telescope during clear, cold evenings thanks to how easy it is to tighten and loosen the large, knurled collar -- even while wearing bulky gloves!
Built around a highly reflective mirror featuring lab-tested dielectric coatings that provide an astounding 99% reflectivity, the Orion 2" Dielectric Twist-Tight Mirror Star Diagonal will help you obtain the brightest views possible through a refractor or Cassegrain telescope equipped with a big, 2" focuser. Plus, since dielectric coatings are more durable than enhanced aluminum coatings, you'll enjoy year after year of exceptional performance without degradation. To further optimize contrast and brightness, the diagonal's anodized aluminum housing features machine-threaded internal baffles to eliminate pesky internal reflections and glare.
The versatile Orion 2" Dielectric Twist-Tight Mirror Star Diagonal includes a handy 1.25" adapter, so it can be used with both 2" and 1.25" telescope eyepieces. Both the 2" holder and 1.25" step-down adapter feature a twist-tight collar to provide the same secure, self-centering, and scratch-free grip for both 1.25" and larger 2" eyepieces and astronomy accessories.
The diagonal's 2" nosepiece barrel is conveniently threaded to accept like-sized filters so you can swap between different telescope eyepieces easily without the hassle of re-attaching the filter onto each eyepiece you use. Protective caps are included to keep the diagonal free of dust when not in use.
Please note: diagonals are not recommended for use with Newtonian reflector telescopes.
Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-447-1001.
Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.