Canon's flagship 600mm super-telephoto — Mark II with improved IS and lighter weight vs Mark I.
The Canon EF 600mm f/4L IS II USM launched in 2012 as a major update to Canon's longest super-telephoto prime, dramatically reducing weight while improving IS and optics. The Mark II dropped nearly 1kg from the Mark I.
Optically outstanding — tack-sharp from f/4 with fluorite elements for extraordinary optical quality. IS provides approximately 4 stops. Ring USM for instantaneous AF. The f/4 at 600mm provides excellent light gathering for wildlife and sports.
Canon EF mount with 52mm drop-in filter holder. Approximately 3920g — dramatically lighter than the Mark I at 5360g. Full L-series weather sealing. 1.4x and 2x extender compatible. Magnesium alloy construction.
Available used at professional to luxury prices. The weight reduction over the Mark I was transformative. The Mark III improved further. For professional wildlife and sports photographers needing 600mm f/4 on Canon EF. Check for IS and AF motor operation.