Canon 5D Mark IV Review - 5D Mark IV Specifications. Photo News. News. Canon 5D Mark III 5D Mark III vs 5D Mark IV: Successor: Weight: 31.4 oz (890 g) Canon EF lenses (except EF-S lenses) (The effective lens focal length is the same as indicated on the lens) Lens mount: Canon EF mount: Image Sensor: Type: CMOS sensor: Effective pixels: Approx. 21.10 megapixels: Aspect ratio: 3:2: Dust delete feature: Auto, Manual, Dust Delete Data appending: Recording System: Recording format: Design rule for kmzj.