07-01-2016, 11:48 AM
Quote:they are fine on the a7s, Colour shifts are present on the a7 and a7r. Admirably the cost saving on the older 15mm is offset by the premium the a7s commands over the a7.
eg: http://www.stevehuffphoto.com/2014/06/20/quick-test-sony-a7s-and-the-voigtlander-15-heliar/
If it wasn't for the tests, I would also go for the A7S (II). I, for one, don't know what to do with 42mp.