OnDSnap wrote:
Aside from other suggestions, Obviously you had time to pose each truck, not sure if this would have been practical for you but, I carry with me a 25' & 100' tape measure for estimating construction jobs. If for whatever reason I was unable to achieve focus, I may have resorted to the tried and true, physically measure the distance and set that on my lens distance scale less a scoche.
BTW, although I can't enlarge them on screen, they look pretty good.
The curse of working with inferior equipment is that there is not a distance scale on my kit lens. Is there another way to determine distance on the lens that I am unaware of?