Paul, several hours after writing this I remembered that later I happen to look at my exposure dial and it was rotated about half-way between Manuel and Effects and think that the dial must have brushed against me while carrying the Nikon D7100 camera by the strap as it has happened several times in the past. Almost all of the time I shoot in manual but leave the iso in auto, sometimes setting a maximum for it and think that the exposure compensation does work in this setting!
Correct. My error was thinking it would with auto iso turned off also. Just a simple thoughtless oversight that was baffling me on occasion and would leave me confused as to why some exposures were funky. When I know there’s enough light to get a proper exposure and shooting something like birds, that are always moving around, I tend to use aperature priority or shutter as appropriate and set auto iso max at 1600, as the Df produces excellent clean detail at that iso. Part of my problem is that sometimes I forget about all these insane (but often useful) menu options available. I have finally taken up setting the body ser up via f controls to where much of what I might want to adjust can now be done with the dials and buttons. For example since I own several old manual lenses and a couple pre-ai ones I can select which one I’m going to mount by just turning a dial. Digging into the menus for such things is not my favorite thing to do. I have found the transition to digital a much bigger challenge than anticipated. Thanks for your observation.