Here is another Canon patent application for RF-mount lenses. This patent describes the RF 80-240mm f/3.5 lens which will be a telephoto zoom lens for EOS R system.
Just like the Canon RF 30-600mm f/4-8 Lens, if goes in mass production, this will be identical to the Sigma 60-600mm f/4.5-6.3. Let’s see if we see it in production. Till then see below the patent details for the Canon RF 80-240mm f/3.5 Lens :
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