spiralling staircase

Artist: ;
Exposure Date: 2011:05:13 18:47:27;
Copyright: ;
Make: NIKON CORPORATION;
Model: NIKON D7000;
Exposure Time: 1/250.0 seconds s;
FNumber: f/4.5;
ISOSpeedRatings: ISO 250;
ExposureProgram: Other;
ExposureBiasValue: +715827882 1/3
MeteringMode: Other;
Flash: Flash fired, compulsory flash mode, return light detected;
FocalLength: 20.0 mm mm;
FocalLengthIn35mmFilm: 30 mm;
Software: Paint Shop Pro Photo 12.00;