Features:

New Ultra black design, fully multi-coated

15mm focal length, 2" fitting diameter

This super 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