08-27-2014, 08:33 AM
CA can also be very much sensor dependent. I remember using the exact same lens on 2 Pentax bodies: K20 with a Samsung sensor and K10 with a Sony sensor. The K20 had much lower CA with the exact same lens. The Samsung sensor was less prone to CA than the Sony in the K10. I remember reading similar statements in the dpr forum. It was actually a nice surprise.