All models have 1¼" barrels and are parfocal with TeleVue's 1¼" Plössl, Panoptic, Nagler, and Delos eyepieces. Named DeLite because that best describes the viewing experience, the name also recognizes designer Paul Dellechiaie's work. The DeLite series is a delightful addition to TeleVue's visionary line of eyepiece developments. Just as Delos eyepieces were developed based on TeleVue's Ethos eyepiece design advancements, DeLite is the logical step toward a smaller, more economical and lightweight version of Delos. The 62° apparent field DeLite retains the pure optical quality of Delos along with 20mm eye-relief, unique sliding, locking eyeguard, and is Dioptrx-ready. TeleVue or TeleVue, no matter how spell it they are the best out there! Specifications Focal Length 11mm Barrel Size 1.25" Apparent Field of View 62 degrees Eye Relief 20mm Weight 0.44lbs Field Stop 11.7mm