Lines, Angles, Curves

Stairs leading up the blast furnaces at the former Bethlehem Steel plant in Bethlehem, Pennsylvania. 

Technical details:
Bronica SQ-A medium format film camera with a Bronica Zenzanon 150mm F3.5 lens.  
Kodak Tmax 400 shot at ISO 400.
1/30th second at F16. 
Developed in Pyrocat HD at 1:1:100 dilution for 15 minutes @ 20 degrees Celsius in Paterson 3 reel tank.  15 seconds initial agitation with swizzle stick followed by 5 seconds of additional agitation every minute thereafter. 
Negative scanned with Epson 4990 on holders with ANR glass.