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Canon's unique constant f/2 zoom — one full stop faster than any f/2.8 zoom — with L-series build and 95mm filters.
The Canon RF 28-70mm f/2L USM (2018) is unlike anything else — a constant f/2 standard zoom, one full stop faster than any f/2.8 competitor. Launched with the RF mount, it immediately demonstrated Canon's commitment to pushing optical boundaries with the new short flange distance.
Outstanding sharpness even at f/2. Subject separation and bokeh at this aperture across 28-70mm is extraordinary — approaching prime lens quality. Ring USM AF is fast. L-series construction with weather sealing. 95mm filter thread is impractical for most.
Canon RF mount, 95mm filter thread. 1430g — extremely heavy for a standard zoom. No image stabilisation. 39cm minimum focus distance. L-series weather sealing. 10-blade aperture for smooth bokeh.
Limited used availability due to high cost and niche appeal. Check AF accuracy and zoom ring smoothness. The RF 24-70mm f/2.8L IS is more practical for most uses. The 28-70mm f/2L is for those who specifically need f/2 zoom capability and will accept the weight and filter penalty.