Canon has announced its widest-ever rectilinear zoom lens with autofocus, the RF 10-20mm F4 L IS STM, and it looks like one hell of a lens. Think of the RF 10-20mm – the world’s widest zoom lens with autofocus – as the mirrorless equivalent of the Canon EF 11-24mm f/4 L USM for DSLRs, which is a stable for professional architecture, interior and landscape photographers, only it’s a radically different design that showcases what’s possible for mirrorless vs DSLR. Like the
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