I have a reasonable lineup of 'L' lenses that I use on a 1D Mark IV. There are two lenses in the lineup that you would have to pry from my cold dead hands and it's tough to pick one over the other. They are the 70-200 f/2.8L IS II and the 300 f/2.8L IS.
I probably shoot 30,000+ Motocross images per season and the 70-200 is pretty much glued to the camera, with the 300 being mounted for when I need the additional reach or want more compression in a shot. 95%+ of my images are shot with the 70-200. If I do my job, it never misses. The images are incredibly sharp with wonderful colour and contrast. My keeper rate borders on unbelievable.
Mine would have to be the TS-E 24mm f/3.5 L II Tilt-Shift... it is tack sharp even when used as a prime.... is so versatile for doing landscapes with the dof and focus placement using the tilt function ....and most of all is great for doing panorama's using the shift function.
I would not leave home without it.
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.