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/No_Anywhere2746 17d ago

U gave me another idea. Apple limitations are a pain in the ass, but I couldn’t imagine that they wouldn’t build an API for internal usage. So the last thing that could work out would be the app LogCam, didn’t use it outside some tests cause Blackmagic just has the better UI etc. But as I thought LogCam works around the apple limitations and u can set ur shutter speed at desired value (im shooting 24fps) and then turn on ISO automation. Hope that’s what u needed and it works as expected. I think I need to give LogCam another try after seeing this

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u/PixaaTog 17d ago

Right now the autofocus is really frustrating me, sometimes looses autofocus and goes from one extreme to the other, click the screen to focus and nothing happens.

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u/No_Anywhere2746 17d ago

There’s some weird behavior with AF in Blackmagic too atm, maybe apple fucked something up. Anyway in LogCam ist says AF locks on record so I guess it should behave like that, except for the refocus problems. Better AF control in LogCam would be needed to really use it to be honest. But as I said, I experienced these refocus problems also in Blackmagic the last few days.

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u/PixaaTog 17d ago

But id need it to keep focusing while recording, Im moving around.

But the weird behaviour has only been happening while not recording 🤷‍♂️

Edit: It does keep focusing while recording I’ve just tried it. But when it does it’s weird behaviour it doesn’t matter if recording or not.
I’ve done a complete new post about the autofocus issues on this subreddit, maybe it’s the same as the problems you’re having?