Hi Carlo, Sorry in the delay in replying to you; life’s events overtook me over the last week or so.

You are right. Legacy lenses tend not to be as sharp as new digital lenses as the glass manufacturing technology has improved. That lo-fi soft look combined with the different colour rendering brings a retro look that many people find appealing, but I get that it is not everyone’s cup of tea. Furthermore, old zoom lenses were never anywhere near as crisp as primes. Again, technology has narrowed that gap considerably over the last few years and my pro-end zooms are pin sharp.

Shooting in 4K will certainly emphasise the limitations of a legacy lens as the definition of the sensor is greater than that of the lens. It’s one of the disadvantages of ever-higher pixel counts that sensors overtaking the clarity of the best glass.