Supertelephoto lenses are tremendously useful, but they can also be quite expensive.
If you are willing to sacrifice having a super-wide maximum aperture, Canon's RF 200-800mm f/6.3-9 IS USM lens offers a lot of the flexibility of a supertelephoto lens without the stratospheric price.
This great video review takes a look at the lens and the sort of performance and image quality you can expect from it in usage.
Coming to you, this excellent review takes a look at the Canon RF 200-800mm f/6.3-9 IS USM lens. At $1,899, the 200-800mm f/6.3-9 is quite reasonable priced and comes with a nice feature set, including:
Minimum Focusing Distance: 2.62 ft (80 cm) at 200mm, 9.19 ft (2.8 m) at 800mm
Maximum Magnification: 0.25x at 200mm, 0.2x at 800mm
17 elements in 11 groups
3 UD lenses
Super Spectra Coating
95mm filter
9 aperture blades for smoother bokeh
5.5 stops of image stabilization
Nano USM autofocus motor
Focusing/Control Ring with selector switch
Weather-resistant design
Rotating tripod collar
Altogether, the 200-800mm f/6.3-9 looks like a very nice performer for the price, particularly when you consider the high-ISO performance of modern cameras and what good noise reduction software can do.