At this time we sell different series of eyepieces, filters and Barlow lenses of five manufacturers: Skywatcher, TS Astro, Soligor, Baader and Pentax.
Additionally we offer nebula and color filters by Astronomik.
Our eyepieces are generally of suitable optical quality and manufactured carefully. Pentax is a well known manufacturer of high performance eyepieces.
Also eyepieces, which do not get very good results within our measurements, are useful for astronomical purposes. Normally it needs a trained observer to determine the differences in performance of the eyepieces. We do not sell eyepieces of poor optical quality or careless manufactured ones. This will be true in the future also.