User manual ORION TELESCOPES & BINOCULARS FOCUSINGADAPTER

[. . . ] Orion Helical Fine-Focusing Adapter #13025 Introduction Most modern telescopes come equipped with rack-and-pinion focusers. [. . . ] To install the helical adapter, first remove any existing 1. 25" adapter from the focuser if you have not already done so. Then insert the adapter into the focuser and secure it with the thumbscrew(s), just like you would a 2" eyepiece. Then insert the 1. 25" eyepiece you wish to use into the adapter and secure it with the thumbscrew. The helical adapter requires that the telescope have at least 9mm of inward focus travel to focus. It requires 17mm of inward focus to utilize the full focus range of the helical adapter. Operation Initial coarse focusing should be done by adjusting the telescopes's main focuser. Once you are close to being in focus, rotate the helical adapter with your fingers until the object comes into focus. Go a little bit beyond sharp focus until the image just starts to blur again. [. . . ] Over time, you may wish to add a small amount of light oil to the adapter's threads to aid in reducing friction. Specifications Size: Fits 2" focusers Eyepieces: Holds 1. 25" eyepieces Focusing design: Helical Material: Machined aluminum Grips: Rubber Extension rate: . 16" per revolution Customer Support (800) 676-1343 Email: support@telescope. com Providing Exceptional Consumer Optical Products Since 1975 Corporate Offices (831) 763-7000 P. O. [. . . ]