The tiny 'chip lens' - X-t20 and Viltrox 28mm/4.5 The tiny 'chip lens' - X-t20 and Viltrox 28mm/4.5 The tiny 'chip lens' - X-t20 and Viltrox 28mm/4.5 The tiny 'chip lens' - X-t20 and Viltrox 28mm/4.5