Nikon says its Z-mount teleconverters will not degrade image quality. Yeah, right.

Best teleconverter
(Image credit: Digital Camera World)

Noboru Sonehara at the Japanese Magazine has been putting Nikon's NIKKOR Z 100-400mm f/4.5-5.6 VR S lens through its paces while pairing it with Nikon's 1.4x and 2x Z-mount teleconverters. His results left us rather puzzled.

See, at Digital Camera World we've come to expect an inevitable reduction in image quality when a teleconverter is fitted to any lens. Heck, even Canon's EF 200-400mm f/4L IS USM Extender 1.4x - a super telephoto lens with a built-in 1.4x teleconverter - produced softer images in our testing with its teleconverter engaged, and that's a lens designed from the outset to work as well as possible with a teleconverter.

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Ben Andrews

Ben is the Imaging Labs manager, responsible for all the testing on Digital Camera World and across the entire photography portfolio at Future. Whether he's in the lab testing the sharpness of new lenses, the resolution of the latest image sensors, the zoom range of monster bridge cameras or even the latest camera phones, Ben is our go-to guy for technical insight. He's also the team's man-at-arms when it comes to camera bags, filters, memory cards, and all manner of camera accessories – his lab is a bit like the Batcave of photography! With years of experience trialling and testing kit, he's a human encyclopedia of benchmarks when it comes to recommending the best buys.