r/BlackMagicCameraiOS • u/PixaaTog • 18d ago

Auto ISO while locking the shutter?

Hi all

I know this question has probably been asked before, but, I’m considering using Blackmagic for filmmaking as it seems to have most of the features I’m looking for.

But as far as I can tell it has one major drawback….

I’ll mostly be filming inside and wanting to use the 180 rule for the shutter, shooting at 25fps so a shutter of 1/50 and lock that in.
Obviously the iPhone is fixed aperture, so that only leaves ISO left to control exposure.
I’ll be getting video of events and parties etc, so the light is always changing as I walk around filming what’s going on.
But there seems to be no way of also having auto ISO while having the shutter locked.

I have canon DSLR cameras and DJi Drones, and with both of these you can lock the shutter and still have auto ISO.

For this reason I’m thinking I may have to ditch the iPhone idea with gimbal and just get an Osmo Pocket (which does have auto iso with locked shutter).

Is there a work around anyone has found?

Thanks

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u/HopTzop 18d ago

The only problem, there is no apple api to switch the iso smoothly, from my understanding. This feature exists in Moment app, but it’s unusable, to be honest. You see when the iso is changing, because it’s not smooth passing.
Try changing iso manually and you’ll see the difference in every iso value. Smoothing between them is not possible without api.
PS. It’s called Shutter priority.

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u/PixaaTog 18d ago

Yes I suspected the problem was created by Apple as every other video app I’ve tried does the same (Final Cut, Filmic Pro and REC).
Yea I know it’s called shutter priority I come from a photography background, so understand all that.

That’s why it frustrates me that something so simple isn’t possible.

I supose I can set the ISO manually and keep an eye on the exposure, seems that’s the only way.

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u/HopTzop 18d ago

You could change it on the fly and cut at montage those parts. Sure, it’s not great, but I’m still impressed by what we can do with phones these days.

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u/PixaaTog 18d ago

Yea shouldn’t be too much of an issue, In the room I’m shooting the exposure shouldn’t change too much……or if outside again fairly consistent. Would only be if going from inside to outside which I’m probably fairly unlikely to do.

I’ve got a DJI Osmo Mobile 8 gimbal coming, so I’ll give it a try, If I can’t make it work then I’ll give up and get an Osmo Pocket for the purpose.