SVBONY SV197 Collimating Cheshire Eyepiece for Newtonian Reflector Telescope Bundle with 66 Degree Ultra Wide Angle HD 6mm Telescope Eyepiece

SV197 cheshire collimating eyepiece can be inserted into 1.25 inch focusers or diagonals. 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. 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. Eyepiece is an invaluable aid to centering guide stars and astrophotography target objects. Relatively high-power 6mm focal length telescope eyepiece with myriad uses is a welcome addition to any astronomer's accessory case. Folding down and removable rubber eye guard for wearing glasses and comfortable viewing as well as blocking stray light to increase the brightness of image. 16mm long eye relief, provides comfortable long term viewing for people with or without glasses. Blackened aluminum fully threaded 1.25" eyepiece barrel and inside thread design to avoid internal reflection and provide a crisp image. Lens edges is blackened to reduce scattering of stray light and maximize contrast;designed to enhance the functionality and pleasure of using your telescope. Planetary eyepiece 6mm; offer high magnifications; for observing small sized objects like planets and extreme close ups of the craters on the moon; among other tiny objects in the night sky.

• SV197 cheshire collimating eyepiece fits for Newtonian and SCT reflector telescopes; also useful for aligning refractor optics very accurately
• Peephole in top; The SV197 cheshire collimating eyepiece can directly see the result of the calibration
• 66 degree field of view; provides a wide field of view; 66° wide-angle eyepiece is especially useful for locating celestial objects; appreciating star fields; and observing larger deep-sky targets like nebulae and star clusters
• 6mm focal length; high magnification detailed observation; 6mm eyepiece can reveal intricate features such as surface detail on the Moon; cloud bands on Jupiter; or the rings of Saturn
• FMC coating; the multiple layers of anti-reflective coating significantly reduce reflections and glare on the glass surfaces; improve light transmittance; help maintain the brightness of celestial bodies; enhance contrast and color fidelity in observed images