DxOMark published the review and test results of the Canon EF 100-400mm f/4.5-5.6L IS II USM Lens.
A long-reaching telephoto zoom characterized by a sophisticated optical design and advanced image stabilization technologies, the Canon EF 100-400mm f/4.5-5.6L IS II USM Lens is part of the esteemed L-series developed for full-frame EOS DSLRs. Canon EF 100-400mm f/4.5-5.6L IS II USM telephoto zoom lens has been awarded as the “Best Expert DSLR Zoom Lens” at 2015 Technical Image Press Association awards (TIPA). Positioned as a versatile option for sports and wildlife photographers, this lens’ list of attributes make it a viable telephoto zoom for a variety of shooting applications. See Best Canon Lenses for Wildlife Photography.
As the replacement for the original model, Canon have improved just about everything they can from operation through to optical quality. However it’s the performance at the long-end that’s crucial and while Canon have made advances most of the gains are in the outer field where users of Canon’s crop bodies aren’t so likely to benefit. Sure the chromatic aberration is lower and sharpness at the edges is better than the old model but users aren’t going to see any improvement in the center.
The EF 100-400mm f/4.5-5.6L IS II USM is also up against a capable and more accessibly priced rival in the form of the Tamron 150-600mm though it’s larger still and somewhat disappointing at 600mm. For all that, the Canon is an attractive option and a strong choice for the long term.
New 100-400mm II Vs. old 100-400mm:
New 100-400mm II Vs. Tamron 150-600mm Vs. Sigma 150-500mm: