Vello EXT-MFTD2 Auto Extension Tube Set for Micro 4/3 Mounts and Lenses

These macro extenders are well made, precise, tight, and very lightweight, in keeping with the lightweight construction of the Z50. Not quite as heavy or solid as the Kenko equivalents. Contact rings are chrome plated metal, bodies are plastic. They look like part of the lens and camera when mounted. Images are superior to those using front mounted optics. Autofocus and exposure are seamless. With a zoom you sometimes have to adjust focal length to get within focus range. The extremely shallow field depth is useful for shooting skittish subjects like birds through a closed window, so long as the window is clean enough the camera doesn't focus on the dirt instead of what you want to shoot. The first photo is a generic definition test with the Z50 DX 50-250 f/4.5-6.3 VR kit lens at 50mm f/4.5 1/80s ISO1000 and 32mm extension. Definition is good at center but not so good at margins. The second is a snapshot through a window with the same camera and lens at 250mm f/6.3 1/400s ISO5600 and 20mm extension (unfortunately with a table lamp light reflected by the window). The third image is a crop of the second showing detail definition. The fourth image is a simple crop of the second without further editing.