Decending through a Fisheye

Artist: Mark Chertkow;
Exposure Date: 2012:02:18 11:40:29;
Copyright: Mark Chertkow;
Make: Canon;
Model: Canon EOS 7D;
ExposureTime: 1/25 s;
FNumber: f/4;
ISOSpeedRatings: 100;
ExposureProgram: Aperture priority;
ExposureBiasValue: 0;
MeteringMode: Pattern;
Flash: Flash did not fire, compulsory flash mode;
FocalLength: 8 mm;
Software: Adobe Photoshop Lightroom 3.6 (Windows);