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

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

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

Our comprehensive listing of key specifications for DSLR lenses

Lomography’s ambitious new 35mm film compact boasts premium metal build and manual settings control. Jon Stapley finds out how well it works