My wife and I (as well as a good friend of ours) met up with Fragla (of this forum as well as pentaxturkey.com) during our vacation in Istanbul. Among the many places we visited was Kucuk Aya Sofia/Little Hagia Sofia or The Church of the Saints Serguis and Baccus. Built in the 6th Century, the church was converted into a mosque following the conquest of Constantinople.
Here is my wife in a 2nd floor window above the nave:
K20d, Tamron 28-75mm at F4, 1/20sec., 1600 ISO(!)
During processing, I found about 3 hot pixels - a first for me. I haven't seen them since and haven't done a pixel mapping yet.
I'll post one or two from other sites within Istanbul as time permits.
BTW - Big thanks to Fragla!