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

This latest upgrade brings 32.5MP resolution, 40fps burst shooting and 7K open gate video to the hybrid arena

Tim Irwin’s 3D printed 90mm lens is a whole lot better than it looks, says Damien Demolder , and it produces some useful, and fun, results