Agonising over astrophotography shots? Traumatised by your next tripod choice? Send your technique and camera questions to digitalcamera@futurenet.com

Our comprehensive listing of key specifications for DSLR lenses

Andy Westlake assesses a unique telephoto lens for extreme close-up photography

Three Nikon D850 users give their verdict

Smaller, cheaper, lighter – Sigma’s updated 35mm f/1.2 lens brings better quality and usability to this moderately wide offering, says Damien Demolder

Well-tailored for many subjects and situations, the Nikon D850 is one of the finest DSLRs ever made