Aligning the mirrors seems easy enough, in the-ory, but in practice it can be difficult without the proper tools. A common way of collimating—the “quick and dirty” method—is to simply remove the eyepiece and look down the focuser tube to center the mirror reflections. The accuracy of this method, however, is not reliable. For one thing, there is no way to know whether you are looking straight down the focuser tube; your line of sight could be off by a degree or two. Another problem is knowing when the reflections of the mirrors are exactly centered. Just “eyeballing it” isn’t precise enough; the reflections may appear to be centered when in fact they are not.
The Collimating Eyepiece will take care of both of these problems, allowing you to achieve precise collimation without “guessing,” and thus improve your telescope’s performance. The Collimating Eyepiece is a combination of a “sight tube” and a “Cheshire eyepiece.” The sight tube’s narrow field of view and crosshairs provide a reference for centering the optical ele-ments during the collimation process.
Collimation is the process by which an instrument’s optical components are brought into precise alignment with its optical axis and mechanical axis. In other words, all the mirrors and/or lenses should be centered and angled so that light entering the telescope forms a sharp image precisely in the center of the eyepiece. If the optics are not properly aligned, stars will appear not as pinpoints as they should, but rather as flared, teardrop-shaped “comets” or “sea gulls.”
The approximately 112mm long aluminum tube is a combination sight tube and cheshire eyepiece. Peephole in the top and wire crosshairs at the bottom allow quick and precise centering of the optics. Fits in 1.25" focusers or in 2"-1.25" adapters. |
Made of high-quality metal aluminum, with dustproof and moistproof rubber cover-expert design-CNC machine made- precise surface dealing the surface is anodized, rust proof and durable. |
A Cheshire eyepiece has a polished flat set in the barrel at a 45° angle, which directs light entering from a cutout in the side of the barrel down into the optical path. The Cheshire allows quick and easy collimation of the primary mirror, assuming the mirror has been marked with a spot exactly in its center. |
The cross-hair adopts strong and durable steel wire instead of easily broken copper wire or aluminum wire. |
Contains detachable lens covers to protect the product from dust when not in use. The cover of the objective lens can be turned down directly when in use, which is very convenient. |
The soft eye cups are comfortable, It can protect your eyes very well when using. Give you a better use experience. |
Copyright © 2005-2021 Astromania Co., Ltd. All Rights Reserved. POWERED BY UEESHOP
Copyright © 2005-2021 Astromania Co., Ltd. All Rights Reserved. POWERED BY UEESHOP