At 28mm light barrel shape. At 100mm, fairly neutral. At 200mm, light pillow shape. Barrel has obvious play. Sharp at open aperture and stopped down.
Definition is altogether good to very good.
At 35mm, light barrel shape. At 80mm, light but visible pillow shape. Independent rotating system. Already at open aperture sharpness and brilliance are very good. When stopped down, the brilliance improves in particular.