Canon’s RF 28-70mm f/2L is a popular lens – but is a longer f/2 zoom in the works? Patent hints at brighter, smaller zooms
A new patent published in Japan details using more autofocus groups in order to create zooms with brighter apertures and smaller designs
Canon’s RF 28-70mm f/2 L USM lens has gained popularity due to its bright aperture, but a recent Japanese patent suggests that the company may be developing a longer f/2 zoom lens. This patent, published on October 16, proposes a design incorporating three or more focusing groups to create compact, high-performance zoom lenses. The patent includes a potential 70-200mm f/2 lens, alongside other zoom lens options such as the 50-85mm f/1.4.
The challenge in manufacturing a bright zoom lens of this size lies in balancing the aperture with weight and size. The patent indicates that using multiple focus groups could potentially achieve this goal, avoiding a significant increase in overall lens weight. While patents do not guarantee a product's eventual release, this design has piqued interest among photographers, given the popularity of Canon’s 28-70mm f/2L USM lens.
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