Zoom Telescope Eyepiece 7-21mm, 40°-57° FOV, 15mm Eye Relief

This zoom telescope eyepiece features a focal length range of 7 to 21mm, providing a versatile viewing experience. It offers a field of view between 40° and 57°, allowing for broad or detailed observations. The eyepiece has an eye relief of 15mm, making it comfortable to use for extended periods. It contains five optical elements arranged in three groups to help produce clear, sharp images. Designed for use with telescopes that have a 1.25-inch barrel, it is suitable for various astronomical observations.