Vast Sky Astronomy Telescope Accessories Bundle with 2-Inch Ultra Wide-Angle Eyepieces 80 Degrees F15mm/20mm/30mm/40mm, 2X Barlow Lens, and 2-Inch 90 Degree Zenith Mirror, Metal High-Definition Full-Surface Broadband FMC Coating, No Battery Required

This eyepiece for astronomical telescopes has a 2-inch interface, a focal distance of 15/20/30/40mm, and is made of alloy frame and optical glass for durability. It features a rubber fold-down eye cup, 80-degree field of view, and FMC coating for enhanced visual experience. Additionally, it has internal extinction thread for 2-inch filters.

Optical device with 2-inch focal length and F15MM aperture, featuring UW80 degrees field of view, 6 lenses arranged in 4 groups, full broadband film coating, and quick spiral storage box

2-inch F20MM UW80 degrees, 7 elements in 5 groups, multi-coated lenses, quick-release rotating storage case

Focal length of 30mm with a 2-inch diameter. Consists of 5 lenses in 4 groups, fully coated with broadband film, and comes with a quick spiral storage box.

The mirror body made of aluminum alloy has a rubber eye mask and a full surface multi-layer anti-reflective coating (FMC), with a 2-inch F40MM UW80 degrees.

Enhanced 2X Barlow Lens with a 2-inch diameter, featuring multi-layer broadband coating for improved image quality, achromatic color correction, and a copper eyepiece protective ring (also known as copper pressure ring).

Mirror at a 90-degree angle with a diameter of 2 inches. The glass is 11.5mm thick and has a highly reflective coating. The eyepiece is effectively protected by a highly elastic and scratch-resistant copper sheet. Features multiple openings and an extinction thread.