This is a very simple test to look at three very different lenses on my Canon C100 camera. I have compared a Canon 24 - 105mm F4 Zoom, a Canon 50mm F1.4 Prime Lens and finally a Pentax SMC 55mm F2 which dates back to 1976! I have shot books on a shelf, flat on, with apertures ranging from fully open to F8. This is not a depth of field/bokeh test. It is purely to look at sharpness at different apertures and see how contrast, in particular, varies with aperture on each lens. The footage has not been graded at all.
Observations are: the Canon 24 - 105mm Zoom is a great go to lens and performs well at full aperture, albeit F4. The Canon 50mm is OK after F2.8 giving a better level of both sharpness and contrast. But it is hopeless wider than that. The ancient Pentax lens is surprisingly sharp at F2, it does have a warm tint that won't match the other lenses without a grade.
I will do some depth of field tests in due course and look at the quality of the Bokeh from all lenses. I expect the Pentax not to be great as it has a six bladed iris. We shall see though!