Editors' note, February 8, 2015: Updated with correction to US prices and addition of Australia and UK pricing.

The company's new 5DS and 5DS R full-frame dSLRs are its bid to compete with cheaper medium-format models.

Canon's 5D line of DSLRs has been an important one, bridging the gap between professional and amateur photography, giving enthusiasts an affordable route to full-frame shooting and pros a smaller, lighter camera to back-up their fully professional-level model.

Full frame sensor; huge detail; Excellent AF; exposure and white balance; Extensive features and accessories

Huge file sizes; Fast shutter speeds or a sturdy tripod and mirror lock-up essential to get the best from the sensor; No Wi-Fi built-in

The Canon EOS 5DS is a natural follow-up to the three-year-old 5D MKIII , a legendary model beloved of many photographers. However, this isn't a wholesale replacement, and isn't even the better performer in every single respect.

With a massive resolution, the 5DS and 5DS R should rival medium-format studio cameras