More from Amazon.com : http://www.amazon.com/gp/product/B0000XMYEW?tag=purrfectcatdi-20 <br /> <br />Orion 7216 1.25-Inch 45-degree Correct Image Prism Telescope Diagonal <br /> <br />For terrestrial or astronomical use this diagonal produces a right-side-up non-reversed image with correct daytime orientation <br />Fully coated prisms for superior image fidelity and maximum light throughput <br />Accepts 125 eyepieces fits in 125 focusers <br />Not recommended for use in Newtonian reflector or Dobsonian reflector telescopes <br />Requires 58 more focus travel than typical star diagonals