You asked
Is the canon rf 100 500mm f 4 5 7 1l is usm long enough for birds?
It's a little short for most birds on full frame. At 500mm, it falls under the 600mm equivalent my wildlife and sport guide suggests for birds. On APS-C, though, it frames like 160-800mm, which is plenty for most garden and lake birds.
Good pairings from the catalogue:
- Canon EOS R7: APS-C, and my pick for birds with this lens.
- Canon EOS R10: a cheaper APS-C body with the same reach.
- Canon EOS R6 Mark III: full frame, if you also shoot sport, but you'll still stop at 500mm.
The lens gets darker at the long end (f/7.1), so bright days suit it best. Long lenses also hold their value, so buying used can save a lot.
Written by Claude from this site's pages.