Carl Zeiss Jena PANCOLAR electric 1.8 / 50 MC
Full review on - http://slrlensreview.com/web/reviews/carl-zeiss-lenses-swhorizontalmenu-172/zeiss-standard/398-carl-zeiss-jena-pancolar-mc-50mm-f18-m42-lens-review From me: Very good job on the focus ring allows precise sharpening. Well suited for macro photography, portraits. Works well as a primary objective. Optics: ★★★★★ Sharp, great colors. Ergonomics: ★★★★★ Perfection. Ease of sharpening Build quality: ★★★★★ Perfection. Small neat, everything works fine. Market value / value of subjective: ★★★★★ Less than $ 150 is a very good price.