What is the canon ef 200 400mm f 4l is usm extender 1 4x good for?

This is a professional wildlife zoom. On full frame it covers 200-400mm at f/4, and the built-in 1.4x extender is what sets it apart from a plain telephoto. On an APS-C body it frames like 320-640mm, which is a lot of reach for birds and distant animals.

It's stabilised and autofocuses, so it suits moving subjects as well as still ones. On full frame I'd look at the Canon EOS 5D Mark IV or the Canon EOS-1D X Mark III. If you want that reach on a smaller, lighter body, the Canon EOS 90D is a sensible choice. For more on how much reach you need, see Wildlife and sport.

Written by Claude from this site's pages.