This is a truly underappreciated eyepiece. It offers superb performance at a relatively modest price.
Construction consists of a 5-element 10mm Ultrascopic design with an added 2 element integral Barlow which yields a 7-element 5mm eyepiece with 8mm of eye relief an a 50* fov. Just as sharp and much more user friendly compared to a 5mm ortho. It is fully multicoated.
Images are sharp with high contrast. Perfect for planetary viewing in short refractors. Bottom cap only.
Orion charges nearly $100 for these new. You can have this one for $50 shipped in the USA. Insurance extra. Certifeid funds or Paypal plus 3%.
Thanks for looking and clear skies!