Even several years ago the Ranger series, produced by the German Steiner company, consisted of five porro prism binoculars which were a cheaper alternative to the top-of-the-range Night Hunter instruments. Rangers' quality was uneven.
very solid and durable casing; low astigmatism; sensible coma correction; slight brightness loss on the edge of the field; proper darkening and good cleanliness of the interior of the tubes; good quality glass BaK-4 prisms; efficient coatings
distinctly egg-shaped exit pupils; noticeable distortion; high level of chromatic aberration on the edge of the field; too light area next to exit pupils