SVBONY SV197 Collimating Cheshire Eyepiece, 1.25 Inch Collimation Eyepiece, for Newtonian Reflector Telescope

SVBONY SV197 Collimating Cheshire Eyepiece, 1.25 Inch Collimation Eyepiece, for Newtonian Reflector Telescope

SV197 cheshire collimating eyepiece fits for Newtonian and SCT reflector telescopes; also useful for aligning refractor optics very accurately The SV197 cheshire collimating eyepiece for accurate alignment of any Newtonian reflector telescope mirrors; ideal for ensuring the optical alignment Peephole in top; The SV197 cheshire collimating eyepiece can directly see the result of the calibration Precision machined from aluminium with fine crosshairs and a clear bright mirror with sighting hole Easy alignment; no batteries needed; for secondary mirror collimation; can be used only during the day How To Collimate Telescope With Cheshire Eyepiece: The view through the Cheshire eyepiece during the collimation will differ between telescopes. For fast telescopes (f5 and below), it will be little off-center, and for the slow telescopes (f5 and above), the view will be more centered and easier to collimate. 1.The goal here is to center the primary mirror reflection in the secondary mirror and reflection from the Cheshire with the secondary mirror. 2.To achieve that, you have to use the adjustment screws on the secondary and primary mirrors while looking through the Cheshire eyepiece collimator tool. CNC integrated processing Rugged and durable, prolong the service life of the product.Ensure product high precision. Steel Crosshairs The cross-hair adopts strong and durable steel wire instead of easily broken copper wire or aluminum wire. EVA lined packaging Ensure transportation safety and easy storage. Specifications: Type: Cheshire Collimating Eyepiece Connection Size: 1.25" Fit : compatible with Newtonian and SCT reflector telescopes Body Material and Processing: Aluminium & CNC Crosshairs of Material: Steel Net Weight: 156g / 5.51oz Dimension: 141*41*32mm Package Includes: 1x Collimation Eyepiece -1.25" 1x Dust Cover - 1.25"