This lens may well be what pushed me from Nikon (Z6 that I love) to Canon. I tested and rejected the RP earlier this year, primarily because of the reverse zoom direction, but decided to stubbornly try again to get the better Canon lenses. Z6 has a better rear display flip up for fast low angle shots, a superior view finder with a larger apparent image, and a shutter that doesn't should like a toy (cringe). RP has the weight and size advantage, and Nikon shows no promise to catch up. Even looking to upgrade my Nikon 400mm f2.8 heavyweight, there seems little point with their heavier best option. I'm motivated to force myself to learn to love Canon to have a happier if less comfortable "marriage." I also trust that the RP can be replaced or supplemented by a next generation mirrorless body to get the most out of the pro lenses, and IBIS for my vintage oddballs like Questar 700 mirror lens and manual Nikon collection.