• New Ultra black design, fully multi-coated
• 15mm focal length, 2" fitting diameter
• This superb ultra wide angle eyepiece has 80 degree field of view
• Standard female thread to fit a filter etc at the rear end
• 6-Elements in 4 Groups Design
• The inside of the adapter is fully threaded to minimize reflections
• Coma-free View out of 72% of the field radius
• Great Contrast and Color Correction
• Packed in a protective plastic case

Specifications:

• The structure of the optical system: Ultra Wide Series Eyepiece
• Barrel Size: 2" (50.8mm)
• Angle field of View: Ultra wide 80 degree
• Optical Design: 6 Elements
• Focal Length: 15mm
• Eye-relief: ≤20mm
• Coating: Fully coated Broadband Green Film
• Threaded for filters and Barlow lens: 2 inch
• Material: Glass + Metal
• Color: Ultra black design
• Net Weight: 230g
• Total Height: 90mm