I've never messed around with film that's much different from the consumer standard of about ISO 200-400. I switched to digital around 2004 and not until the recent years I've been wanting to experiment with film again.
Now I'm just trying to select types of film I like the look of to try in some cameras I have, in this case specifically for a balanced general purpose (let's say a mix of outdoors and sometimes in a shade or well-lit room). But sometimes I run into films I like that are as high as ISO 1600 or 3200.
Of course I CAN/COULD use anything, as there's nothing keeping me from doing so. But generally it's said that 400 or lower is useless indoors, and you should go with 800 or up. But since the latter is intended/recommended for such low-light conditions, would that (1600+) be too sensitive to use in daylight?
I'm sure the camera's meter would indicate whether or not it's overexposed, but even if it doesn't, is that kind of film prone to being overexposed? Or maybe it just has aggressive highlights or some such side-effects? - Or will it always balance out when you're using the right settings anyway? As in, just using shorter shutter-times and higher apertures to not get too much light in.
I do have an exposure-adjustment on the particular camera I want to use for it, which I'd already be turning down by one step when I'd be using 3200 at the camera's maximum setting of 1600. - So I'd have another step left if necessary.
Basically the question is whether or not ISO 1600/3200 is overkill when using it in bright natural light.
(Mind you; I do not mean intentionally seeking out TO shoot in bright sunlight with a high ISO film just to be stubborn. But just like a non-cloudy Summer-ish day during which I could happen to be shooting. And again, I suppose I could (guess and) adapt using the exposure-adjustment as conditions change, much like I did on digital cameras. Except in that case I could see the result beforehand, so I'm not sure what the effect is on film.)