One of the niche, yet loved lenses from the EF mount era is going to get the RF treatment with an all new design in 2024. That lens will be the Canon RF 400mm f/4 DO IS USM.
Canon has made three “DO” branded lenses, all for the EF mount. The first was the original EF 400mm f/4 DO IS USM in 2001, and in 2004 they launched the more affordable zoom offering, the EF 70-300mm f/4.5-5.6 DO IS USM. In 2014, Canon released the EF 400mm f/4 DO IS USM II, which improved the contrast issues found in the first version. All of Canon’s past EF DO branded lenses have been discontinued.
We have been told that Canon will once again bring a DO branded lens to the RF mount, in the form of an RF 400mm f/4 DO IS USM. The lens is coming some time in 2024, and will continue to improve on Canon’s DO lens designs.
Many years ago, Canon did show off an EF 600mm f/4 DO IS USM prototype that never came to market, but we have received some hints that Canon does have a 600mm DO lens in the pipeline, but not before the RF 400mm f/4 DO IS USM is announced.
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