See and Buy this product on Amazon.com store (affiliate):
It is a pretty impressive little lens. It doesn't quite attain the same heights as the FE 55mm F1.8, but it's still impressively sharp. It's also very small and portable, but this does come with some trade-offs, particularly in terms of vignetting. Overall it's a good match for both the Alpha 7 and Alpha 7R both physically and optically, but we do feel it's somewhat over-priced given its relatively slow maximum aperture.