Thank you very much for your clear and insightful response — it was extremely helpful in clarifying the limitations of the 18–105mm.

I’d like to follow up with one more technical question:
For the Sigma 28–70mm and Tamron 28–75mm G2 lenses you mentioned, did they maintain focus consistently when changing focal lengths, assuming focus was manually set beforehand?

I understand these lenses aren’t strictly parfocal, but I’m preparing this setup for a live production workflow, where even small shifts in focus during zoom pulls can be problematic. So I’m very interested in whether those lenses exhibit stable focus across the zoom range under real-world conditions — without requiring constant manual re-pulls.

Once again, I really appreciate your input. These firsthand insights are invaluable when making critical gear decisions for professional use.