Hi Jim and thanks. Your post regarding GFX-100 was best aligned to my question and makes perfect sense. For other folk reading this, the make of camera can be disregarded, if you have a dual gain sensor camera the same observations apply, subject to finding out the dual gain ISO for your particular camera.
I'd like to dig a little more here, for the benefit of beginners and the curious. I'm in the curious camp. You state that you don't use auto ISO and I understand why, but we shoot different stuff.
To dial that in a bit more, let's consider the likes of myself that shoot on film sets and events in general, in very dynamic and changing lighting environments. This might also apply to folk such as wedding photogrphers.
I've set out how I do it and why. I'm very curious as to whether you'd still use a fixed ISO for my kinda bread and butter work as opposed to my "M mode auto ISO strategy". And if yes, how and why?
Finally, if you do propose an alternative way of working would it give a dramatic gain in IQ without slowing down how you shoot in such dynamic environments?
I think I'd like to get to a point where we have clearly understood best in class strategies based on genres shot.