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rumorreliability: lowvia Canon Rumors14 Nov 2026
Rumor: Canon may build a teleconverter into its next RF supertelephoto primes

Canon Rumors reports that Canon is expected to refresh its RF 400mm f/2.8L IS USM and RF 600mm f/4L IS USM. The site notes that both lenses were first designed for EF mount and later adapted to RF, which it presents as a reason for a modern redesign. The site suggests the built-in teleconverter… Canon RF 400mm F2.8 L IS USM · Canon RF 600mm F4 L IS USM

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Canon RF 400mm F2.8 L IS USM

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