For a long time, the holy trinity of zoom lenses has been considered the 16-35mm f/2.8, 24-70mm f/2.8, and 70-200mm f/2.8, with slight variations in the focal lengths from manufacturer to manufacturer. However, Canon may be looking to up the ante in a major way by creating a holy trinity of f/2 zoom lenses.
The Canon RF 28-70mm f/2L USM lens has been received with rave reviews, as its awesome image quality and insanely wide aperture (for a zoom lens) really blur the line between prime and zoom. It seems Canon might not be content to stop there, though. Canon Rumors is reporting that the company may be working on a second f/2 zoom lens that will eventually join a third to become a holy trinity of f/2 zooms. No doubt, such a trio of lenses would be both heavy and expensive, but they could actually end up saving weight and cost for a lot of photographers. With the high-ISO capabilities of modern cameras, excellent sharpness, and a maximum aperture only one stop away from most fast primes, people like wedding photographers might choose to forgo primes completely and just carry three such lenses. Of course, we've yet to see if the lenses will actually come to market, but it'll be quite interesting to see what happens if Canon continues to push the boundaries of lens design.