Canon's two newest professional DSLRs, the 50 megapixel EOS 5DS and 5DS R, share the distinction of offering the highest resolution available in the full-frame class. The 5DS uses an optical low-pass filter, while the S R's low-pass filter's effect has been cancelled out for optimal detail resolution.

Aimed at studio and landscape photographers, the two models provide a 61-point AF module, dual DIGIC 6 processors and new mirror lockup options to help get the absolute most out of that high-res sensor. We've had our hands on the 5DS and 5DSR - take a look at what's new and find out our initial impressions.