a6000 is APS-C, so 1.5x crop factor, 55-210 therefore is equivalent to 72.5-315 full frame. At 5-6 miles away that would mean each of your pixels (24mp sensor I think?) are something like, a 16-19cm square. I don't know if it's enough for architectural detail. I feel like it wouldn't, I have a cathedral I often take pictures of, at 1km it's okay, kinda fills the frame on the 55-210, at 3 miles (~5km) it's really small in the frame.