I don't know about Dx0 Mark...It seems they way over do the scores for Nikon cameras. From some experience... I was shopping for a camera for my wife and it was between a Canon t5i and a Nikon d3200. The Nikon D3200 had a way higher Dx0 mark score, I had purchased both cameras and was testing them out and found that Images where about the same in IQ, but Dx0 mark rates the Nikon d3200 as IQ 81 and Canon t5i 61!! How is this?, according to Dx0 mark the Nikon destroys the Canon ?? Me and my wife both really disliked the Nikon for other reasons and went with the t5i and the Nikon went back on Craigslist. Also I was looking at the Dx0 Lens scores and again Nikon lens blow the Canons away, I am seriously skeptical of their testing methods. By any chance is Dx0 mark somehow affiliated with Nikon? anyone know the details of the company?