Recently i became a happy owner of quite old yashinon lens which capable to produce very sharp images with possibility to do macro up to 1:1. Notice also amazing colors!
As usually, main problem for me is to focus correctly and not to forget to close apperture, so i will get longer sharp distance.
Here is a fly with quite sharp eyes:

Another example a little flower which is not so little with 1:1

Here is a warm evening composition: