Adjust your camera!
I have always been taking to much flag for caring about the technical aspect of photography. But, how did caring about image quality become a bad thing? Why do I care about people shooting at 1/1600th, when clearly 1/160th’ would have been enough to freeze any motion. Shooting at ISO 10,000, F4, 1/2000th’, when clearly ISO 2500, F4, 1/500 would be more appropriate? Because I CARE about image quality.
When did photographers become lazy?
I know that Full Frame cameras today fair exceptionally well at crazy high ISO’s. But is that a reason to just park your ISO at 6400 and forget it? NO! If possible, why would you not shoot at at lower ISO? I could simply use my primary and secondary dials to keep shutter-speed at aperture where I want them, and let the metering take case of the ISO. But I’m not a lazy SOB. It’s a job. It requires a skill set. I expect YOU as a photographer, to judge lighting, to make decisions about your exposure. NOT your camera. I expect you to know what a f-stop is, bot ISO, aperture and shutter speed. And what it does for your image to go from ISO 1600 to 2500. Or from 160 to 400 ect. To know what Dynamic range and color depth is.
But I have now realised why I care about the technical part of photography. It’s because I care about image quality. It’s because I often shoot at the outer limits of what modern cameras can active. I can’t afford to shoot like a moron, at 4 times the shutter speed needed, because that would raise my ISO above any reasonable level.
Keeping aperture constant, If you, consciously, shoot someting at 1/800’th ISO 4000, where only 1/200’th is needed, your should feel blessed that your new camera handles High ISO better than your old camera, nevertheless; you are still throwing away dynamic range, and adding noise at a level that is really not needed. If your think your image are “good enough”, that’s fine by me.
I know that in the heat of the moment, things can be adjusted in a less than optimal way. Did lights go up, just as he is jumping off the stage? Leave your ISO, and bump the shutter speed, if it’s faster for you. You probably need the faster shutter speed fo freeze him, if he’s jumping, anyway.
Do you feel like all your images get blurry at shutter speeds slower than 1/400? Well, then by all means, shoot at a fester shutter speed. Do you like to shoot your expensive 70-200 F2.8 af F4, to get a bit more in focus. By all means, do that. But make conscious decisions, and know what impact it has on your images.