Under a watchful eye

An outdoor shot between cell block walls shows a central guard tower as it rises up over the rest of Eastern State Penitentiary. The prison, located in Philadelphia Pennsylvania, was built in 1829 and closed in 1971.  

Technical details:
Sakai Toyo 5x7" large format metal field camera with 4x5" film back.
150mm Caltar-S II F 5.6 lens in Copal BT shutter.
Ilford Delta 100 film shot at ISO 100.
Exposure was 1/4 second at F32.
Developed in Ilford DD-X 1+4 dilution for 10 minutes @ 20 degrees Celsius using a Beseler 8x10 print drum placed on Unicolor Uniroller 352 auto-reversing rotary base.  
4x5" negative scanned with Epson V600.