Specifications: Type: Prism binoculars Magnification: 10x Objective Lens Effective Diameter: 1.7"
Filter Size: 2.0"
Real Field of View: 6.5° Apparent Field of View: 65° Objective Lens Construction: 4 elements in 3 groups (including protective glass, UD Lens) Eyepiece Lens Construction: 7 elements in 5 groups Exit Pupil Diameter: 0.2"
Eye Relief: 0.6"
Prism Type: Porro
Type: SIGMA 30mm f/1.4 DC DN Contemporary Lens for Sony Mirrorless Cameras and APS-C format e-mount The lens is made in Brazil and features a maximum aperture of f/1.4, high-quality optical design with aspherical and high-refractive index elements, and a stepping AF motor for smooth, near-silent autofocus.