Canon stated that both the 5DS and 5DS R will not replace the older EOS 5D Mark III, so therefore both the 5DS and 5DS R will have their new positions in Canon's DSLR camera lineup. This distinction is roughly similar to that between Nikon's now-replaced D800 and D800E (with the E having a self-cancelling filter). The only difference between the two models is that the sensor of the 'R' version includes an optical filter that cancels out the effects of a standard optical low-pass filter. Both are professional full-frame cameras with 50.6-megapixel sensors, the highest of any full-frame camera at the time of announcement. The Canon EOS 5DS and EOS 5DS R (known as the EOS 5Ds and EOS 5Ds R in Japan) are two closely related digital SLR cameras announced by Canon on February 6, 2015.