Here's a sad example of how a cities core area decays...
Downtown Cairo, Illinois.

. . Cairo, Illinois by Reinhold S., on Flickr

Made with a Fotoman 617, which has been modified to 6x15 format.
615 format holds to the classic 1:2.5 ratio as on 7x17" & 8x20" banquet cameras.

Reinhold
www.classicBWphoto.com
www.re-inventedPhotoEquip.com