For astronomy enthusiasts and astrophotographers seeking superior optical performance, the Baader Planetarium 36mm Hyperion Aspheric 72-degree Modular Eyepiece stands as a groundbreaking product. As one of the first eyepieces globally to incorporate innovative aspheric surfaces, this high-quality eyepiece effectively eliminates aberrations without the need for extra lens elements, avoiding unnecessary bulk and weight.The durable and reliable Baader Planetarium eyepiece boasts a unique design, utilizing 2" x 24 tpi SCT threads for attaching the 2" barrel. This innovative feature allows the Hyperion Aspheric eyepiece to thread directly onto the rear cell of popular Schmidt-Cassegrain Telescopes (SCTs), resulting in unparalleled rigidity, which is crucial for high-precision imaging.This versatile eyepiece comes with two barrel sizes, each designed to maximize your viewing experience. The standard 2" barrel delivers a full 72-degree field of view, immersing you in the celestial spectacle. Meanwhile, a specially designed wide field 1-1/4" barrel offers the maximum true field in this barrel size, with a field stop of 1.265" (32mm). This feature is perfect for extracting every bit of field possible in 1.25" focusers or bino-viewers, making it an ideal choice for observing large areas of the sky or capturing stunning astrophotography.In summary, the 36mm Hyperion Aspheric Eyepiece for 2" and 1.25" Focusers from Baader Planetarium is a testament to the brand's commitment to delivering innovative, high-quality optical products for astronomy and scientific applications.