My story is interesting. I bought 5DsR. About a month passed and was horrified. Some kind of imperfection, everything is fuzzy, soap, etc., is sold. I bought 5DMarkIV. I took six months, but still thought what happened to DsR? I purchased 5DsR again. Large files are torture, because I shoot a macro, and there are stacks of frames, and returned to 5DMarkIV again, but only for a week. After a week of testing 5DsR, I apologized,, 5DMarkIV passed it to my daughter, and he finally returned to 5DsR and not only returned, but also bought a second 5DsR.