Brian Flexmore

Have you tried the Angenieux 20-120mm zoom? It has similar aesthetics to the time period. I don't have on in the office but I'm sure it's at least 2Kg lighter. I don't feel you can quantify and reproduce the look of an older lens with a modern one with filtration. There's nuances like flaring/glaring/coating/field curvature/falloff etc. which offer an inherent optical quality or "look" which can't be replaced with just a filter. Just my 2 cents.

Too true :)