This chunky lens is a terrific telephoto prime with an exhilarating turn of speed www.sigmauk.com

All your questions answered. Send your questions to digitalcamera@futurenet.com

Our comprehensive listing of key specifications for DSLR lenses

A not-so-standard, standard prime for full-frame Nikon and Sony mirrorless cameras www.viltrox.co.uk

Consumer Camera of the Year and Product of the Year

Sony’s enthusiast-focused all-rounder brings major updates and performance boosts, but is that enough to bring it back to the top of its highly competitive class? Andy Westlake finds out