In April of this year, Tamron announced that it was developing its first autofocus lens for Canon RF mount – the Tamron 11-20mm f/2.8 Di III-A RXD. Now, with the official release scheduled for ...

It appears that Canon has just loosened the stranglehold, though, as Tamron has announced the development of its first RF lens – with autofocus – and Sigma is set to follow suit later in the year.

And while we've seen a spattering of lenses from third parties, including autofocus options from budget brand Rokinon-Samyang, the big players (Sigma and Tamron) haven't jumped on to make RF-mount ...

which ordinarily would be filled by third-party manufacturers like Sigma and Tamron. A Canon EF-S dual fisheye lens; one of the few native RF-S lenses from Canon, but not exactly a general-purpose ...