Used my Nikon D850 & 24-120mm f4 combo in the cathedral in the city of Lund in Southern Sweden. The conditions inside the cathedral itself was typically quite dim but down in the crypt it was quite dark with very subtle artificial lights and natural light from some small windows. I set the camera to aperture priority f8, auto iso between 65 and 4000, RAW format as always and shot these all hand held. The camera predictably chose iso 4000 in pretty much all of these photos. I then ran them quickly through DXO Photolab 4 to work it's magic and exported to jpg format. None of these has been colour corrected or sharpened or had the exposure adjusted aside from whatever standard tweaks DXO PL 4 does when processing the RAW files.