For sports, wildlife and other shooting scenarios where you need plenty of reach, the undisputed king of Canon’s EF lineup of zoom lenses is the EF 200-400mm f/4L IS USM Extender 1.4x. The built-in 1.4x ‘extender’ gives it a maximum coverage of 560mm, with a drop in aperture rating to f/5.6. You’ll need deep pockets though, as it retails for around £12,069/$11,997, and it’s been discontinued, so stocks are dwindling. In the RF camp, there’s the new RF 200-800mm F6.3-9 IS USM, which gives even greater and truly impressive zoom range, albeit with a relatively sluggish f/9 aperture at the long end. Even so, it’s much more manageable and affordable, at the relatively bargain price of £2,299/$1,899.…