Nikon has announced that it will add two teleconverters to its mirrorless Z-series lineup this summer: the Z Teleconverter TC-1.4x and TC-2.0x. Both are weather-sealed, with fluorine coatings on front and rear elements to resist smudges, and retain autofocus capabilities with all AF points up to F11. The teleconverters will be compatible with ‘select’ Nikkor Z lenses, including the 70-200mm F2.8 VR S. It’s likely (but unconfirmed) that they’ll also work with the 100-400 and 200-600mm tele-zoom lenses currently on the Z-mount roadmap that should be released next year.

Both teleconverters are compact designs with a protruding front element meaning that, like recent F-mount equivalents, they cannot be ‘stacked’ or combined.

The 1.4x and 2.0x teleconverters will sell for $550 and $600, respectively, and will go on sale in late August. They will be sold alongside the previously-announced but delayed Z 70-200mm F2.8 S, which is expected to become available in the same timeframe.
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https://www.dpreview.com/news/5444024860/nikon-z-mount-1-4x-and-2x-teleconverters-arrive-in-august