roig12 wrote:So let's make up a scenario where I have too much light and since I don't like touching the shutter speed (keeping it double the frame rate the whole time) and don't like using the aperture too much as I use that for setting the depth of field that I like then I'm down to ISO and ND filters.
So let's say I put an ND filter and it's a bit too dark while I'm at iso 400, so I push it to 600 to see the exposure I want in the monitor.
Is that approach normal?
and to sum the DR thing, so if I need more or less exposure and am using the iso to get there then I won't lose any quality by straying away from the native iso as long as it gets me the exposure I need in order to show the areas Im after more clearly (more shadows or more highlights) right?
I mean, it's always better to expose correctly than keep the native iso and have the image too dark right? but now comes in the iso is just metadata thing so am again confused
No, on just about all of it. To begin, let's simplify: we're talking only about braw and the lower BMPCC 4K circuit, meaning 100 to 1000.
Under these conditions, you have 4 ways of changing the exposure: the aperture, the shutter speed, adding or reducing light and ND filters. Changing the ISO by itself -- without adjusting one of these other factors -- will accomplish nothing, except making the screen brighter or darker.
Put another way, if the aperture, the shutter speed and the lighting remain constant, you'll capture exactly the same image whether the camera ISO is set to 100 or 1000, or anything in between. If you're passably skilled in Resolve -- which sounds doubtful at the moment? - you can verify this yourself.
If all this is still impenetrable I suggest you set the camera ISO to 400 and leave it there. If you want to change the exposure, you need to alter one of the other variables. Leave the ISO alone. It's not a tool of exposure, under the conditions established above.
Where there *is* an advantage to changing the ISO setting is the upper circuit 1250-6400. Where the light is so low you have lots of noise in the 100-1000 circuit, you're often better off switching to the upper circuit, at the expense of a stop or so of dynamic range. But that's another and different matter....