I use the cheaper Sony/zeiss lenses like 55 1.8 when I want AF and then use all manual Contax zeiss . Cheaper and amazing quality. For £1000 I have 55 1.8 zony, cy 28 2.0, cy 85 2.8, cy 100-300 f4-5.6. Stunning glass that works on my nx1 too (when not using 16-50s).