MTF (resolution) The EF 24mm f/1.4 USM L showed two different souls in the lab. The center performance of the lens already good to very good at f/1.4 increasing to superb resolution figures from f/2.8 onwards where it easily reaches and probably exceeds the resolution limits of an 8mp sensor. Unfortunately the borders aren't quite as good.
Versus the RF 100-400mm IS USM. Canon RF 100-400mm f/5.6-8 IS USM. Like most companies, Canon announced this huge, expensive RF 100-500mm L IS first, so that all the rich people who wanted to buy one would, and so that all the people who wanted a long zoom for their EOS-R series camera bought it if they could afford it.
The Canon EF 135mm f/2 L has also always been an extraordinarily sharp lens with superb bokeh. It has much more spherochromatism than this new RF 135mm f/1.8 L and won't quite be as sharp wide-open for scientific and astronomical use, however for portraits it's superb. It has no optical stabilization.
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