Olympus 50mm f1.8: Vignetting

today will do that and in fact it's difficult to find a vintage lens that doesn't do that however what it does do is sharpen up a lot when you stop it down to 5.6 and the vignetting pretty much disappears this is not a perfect lens it won't make you perfect images in the way that a modern lens

And for light striking the lens at an angle, a good deep hood helps, of course.

wind heading in the corners at f 2.8 it gets much better and at f4 it's gone when we point the lens against the sun we can see there is not much flaring but a lot of ghosting i think it's not distracting at all and i think for this old design it handles flare and ghosting very well since