I’ve been collecting quite a few vintage lenses, and I consider some of them to be very good lenses, while others seem lacking. I’ve decided to create a “Sharpness list” for these old lenses (most are older than 30 years old, and some are over 40 years old).
I should mention the methods I’m using to determine what is (at least according to my eyes) a sharp lens. I am using an image focus comparison chart (a “fine resolution” spoked star chart), affixed to a wall, and illuminated with daylight.
A Storm Of Photons 