Nikon's high-end 36MP D800 and D800E DSLRs have been consolidated with the release of the D810. It is not simply an upgrade: major changes substantially extend its capabilities and make the camera more attractive to buyers considering a move to a full-frame camera. Some features from the D4s have been incorporated into the D810. Videographers, for example, will be pleased with additions to its video feature set. Other refinements include a redesigned shutter and mirror mechanism to reduce the shock of shutter actuation, which can reduce resolution. There's also a new S-Raw mode for reduced-resolution raw capture. AUTHOR: Jon Sparks is an award-winning photographer and writer based in Lancashire, UK. He has worked on five continents and specialises in landscape and outdoor pursuits. He supplies images to the global libraries Corbis and Alamy, as well as selling images directly through his own library.