This is an older eyepiece, and its lenses are heavily scratched. However, it still gives one of the brighter images, and has the best eye relief of any eyepiece at CRO. Note that the eyepiece has a slightly longer focal length than advertised.
Although the eyepiece barrel is threaded, the threading does not match standard filter threads. Any filter screwed into the eyepiece is likely to fall out during use. If you want a mid-power eyepiece that supports filters, use the Sirius Plössl.