shifting of the tenses in Would clause

HI.
Is shifting of the tenses a must in Would clauses?

'' ISO displayed in viewfinder – I would not upgrade to a camera that didn’t have this feature''


could ''doesn't have'' be possible too?


many thans

I think you could use either "didn't have" or "doesn't have" in this case.

(BTW -- my current camera doesn't have ISO in the viewfinder, and when I eventualy upgrade, I'd be more concerned with sensor size, pixel size, noise, frame rate,etc., than ISO in the viewfinder.)

For me, "didn't have", there, is a timeless/all time expression: "doesn't have" seems to have present reference.