Antares 9.1 mm Speers-Waler Series 4 Eyepiece - 1.25" - SW9S4 Tripods Three focuser extension rings are

Three focuser extension rings are provided for a “flex-free” solid extension as a means to take up any unneeded back focus

While observing the moon or planets

It can fit all iOptron mounts

planetary and solar subject matter as well as on deep sky objects

perfect for viewing wide-field deep sky objects or daytime terrestrial scenes

Antares 9.1 mm Speers-Waler Series 4 Eyepiece - 1.25" - SW9S4 Tripods Three focuser extension rings areAntares 9. 1 mm 1. 25" Speers Waler Series 4 86 Eyepiece Product Highlights: Antares Speers Waler Type Series 4 Eyepiece 1. 25" Barrel, 9. 1 mm Focal Length, 8 Element Eyepiece 86 Degree Apparent Field of View (AFOV) 10 mm Eye Relief Includes Eyeshield Includes a Rubber Grip for secure handling Optics are Fully Multicoated The Antares Series 4, Speers Waler Eyepiece is a superb quality eyepiece with a focal length of 9. 1 mm and an AFOV of 86. It is a