If you need to use Nikon F lenses (with manual aperture dial) on your Canon EOS camera body, nothing is simpler than the Cinevate Adapter for Nikon lenses to Canon EOS bodies. This little guy is chrome plated brass so it’s nice and strong. This adapter can usually maintain focus for most Nikon lenses from macro all the way to infinity, but some lenses might struggle at infinity due to the individual tolerances of the lens. You will not have autofocus or aperture control. And remember, it’s Nikon "D" style lenses only (you can’t use lenses without a manual aperture dial). It's not an ideal solution, but can sometimes work in a pinch when you have no other options.