Hi, I'm currently seeking a 28mm adapted lens for my E-P5 (indoor portrait), budget is less than 500. I've seen many threads discussing between Vivitar, Zuiko, Minolta, Kiron, Pentax 28mm F2/2.8 ... etc, and also know groups of ppl doing comparison on Voigtlander with Zeiss or Leica, but haven't seen a thread discussing image quality between Vivitar (or OM, MD...) and Voigtlander (not the native lens designed specifically for m43). Is it due to the price level, and certainly the CV is better than Vivitar or other similar price level products? It seemed that the Vivitar 28mm 2/2.8 has quite good reputation, but CV 28mm 1.9 has very nice photo samples on flickr as well. The price of CV 28mm 1.9 is higher than majority of others mentioned in the front (except Zeiss and L) but still affordable for me, so I was wondering if it is worth to spend extra ~300 to get CV or simply unnecessarily. Any opinions will be appreciated.