It being Father's Day a nearby hotel celebrated with $38 burgers, whiskey tastings, and a local Jaquar club showing off a few cars (mostly non-Jaquars). Thus more testing to try to figure out this confusing Light Lens Lab 50mm f/1.5 Z21 (Angenieux S21 clone). Paired with the SL (typ 601). Makes one more appreciative of modern flat field lenses. Still old lenses for old cars.