Looking for a zoom booster to flesh out your NEX or MFT kit? Then take a highly magnified gander at Kenko Tokina's 400mm f/8 mirror lens, which now comes with both E- and T-mounts to complement the manufacturer's existing SLR-compatible range. So long as you don't mind the light-sapping aperture and manual focus, you'll be able pick one up in Japan tomorrow for a price that should soon become apparent. Just bear in mind that other new MFT options from Tamron and Astrodesign are likely on their way too.

[Thanks, Tibor]