A 50 mm that can do almost anything

And if I say almost, because it is not the last USM Canon lenses. And that therefore its development is noisy and rather slow.
The production is exemplary, any metal robust. The lens extends when you want to make the macro, so be careful not to touch the subject.
Rest and outside it, it is a marvel. The sharpness is just fabulous, developing precise and perfect in auto to manual. Why? Because the ring has sufficient hardness to be nice and it takes almost do 3 laps to cover the range of focus. What makes it very accurate, especially for a lens which can make the macro. At 50 mm, it will not make the super macro zoom, but it is quite sufficient for flowers, for example. The opening 2.5 is completely valid to do this.
In short, macro, very good.
Rest other applications possible for a 50 mm, like the portrait. It works fine too, we get very good sharpness and nice blur.

Now it is always possible to compare this goal, made with old, certainly the end of life, technically, but certainly not in terms of quality photo, with the 3 remaining 50 mm of the Canon range, the F1.8 The F1.4 and F1.2. After all, they have a better opening.
I think we can find for a while yet, but this one, which has a very good press among professional photographers and disappear fast, especially that Canon manufactures the most.