The ring

Exposure Date: 2014:06:23 17:47:54;
Make: NIKON CORPORATION;
Model: NIKON D800;
ExposureTime: 1/50 s;
FNumber: f/4;
ISOSpeedRatings: 200;
ExposureProgram: Aperture priority;
ExposureBiasValue: 0/1;
MeteringMode: Pattern;
Flash: Flash did not fire, compulsory flash mode;
FocalLength: 50 mm;
FocalLengthIn35mmFilm: 50 mm;
Software: Aperture 3.5.1;