03-02-2019 02:07 AM
I'm using a GoPro Hero 7 Black with ND filters and I'm running into an issue whenever I have a clear blue sky; there's a ton of grain in the sky.
Does anyone know how to correct it in post? Not sure if it is a sharpening issue or a color issue.
03-02-2019 04:29 AM
03-02-2019 11:01 AM
I have ISO limited to the 100-1600 range with -0.5 EV Comp while using an ND32 filter. I cannot keep the shutter at 1/48 when shooting at 24 fps and not have the whole picture blown out on a day like that.
Even if it was working at 1600 ISO this level of grain exists?
03-02-2019 02:09 PM
I'm not sure I follow. Are you saying that the entire ISO range above 100 is unusable? It woould seem like a serious miss from GoPro if that were the case, particularly for those of us that need to shoot at slower shutter speeds. As an action camera, it is difficult to discard the ISO range without an operator.
03-02-2019 03:12 PM
More or less. Anything above ISO 400 is questionable. Only ISO100 is really clean.
Hero6 and Hero7 Black uses the Sony IMX277 sensor. At the price point its probably the best 1/2.3 sensor available. Of course noise and ISO performance will not be the same as an 1", 4/3" or 35mm sensor in any way, shape or form.
To quote from Abe Qislevitz blog (a member of the GoPro media team:
""Locking ISO at 100 will give your footage a richness and cleanliness you’ve never seen before from a GoPro. ISO is basically the digital light gain to make the scene brighter. In auto shutter mode, ISO 400 is the lowest value we can go, but even 400 has a good amount of noise/grain."
Also take a look at the Hero7 recommended settings here: http://abekislevitz.com/gopro-hero7-black/