Because of its superior design and advanced features, the 10mm Ethos-SX 2"/1.25" Eyepiece offers an unparalleled viewing experience. With a 100-degree apparent field, it delivers a viewing area that is 50% larger than the 82-degree Naglers, providing a more expansive and immersive observation experience. This eyepiece is designed with comfortable eye-relief and accepts DIOPTRX eyesight astigmatism correctors, making it a versatile choice for users with varying vision needs. Its high contrast and on-axis sharpness make it an excellent choice for planetary viewing, offering crisp, clear images of celestial bodies.The 10mm Ethos-SX Eyepiece is a "do-it-all" accessory, compatible with all scopes that can accommodate this focal length. It effectively "fills the hole" between the 13mm and 8mm eyepieces, making it the perfect centerpiece for a 17mm/10mm/6mm Ethos set.One of the key benefits of this eyepiece is the combination of a large apparent field of view and shorter focal length. This combination allows for higher magnification, resulting in a darker sky background. This enhances the visibility of fainter stars and reveals more detail on all deep sky objects.The Ethos-SX Eyepiece offers a significant magnification and contrast boost, providing dramatic views that were previously unattainable with any telescope. The smaller exit pupil also reduces eyesight limitations, making it a more accessible option for many users.In addition to matchi