BMMSC: simultaneous zoom & focus possible?

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Daniel Binder

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  • Joined: Fri Jan 30, 2015 9:54 am

BMMSC: simultaneous zoom & focus possible?

PostWed Feb 03, 2016 4:17 pm

Hi everyone.

We are experimenting with a software to control the new Micro Studio Cam 4K.

Using the ATEM CCU (via SDI input), is it possible to make the camera to do several operations simultaneously? i.E. A slow zoom out and a change of focus at the same time?

For now, if we send more than one parameter change to the camera, it chooses one random one to execute and ignores the rest :) As a workaround we added a slight delay between sending the parameters, which works for most, but not for zoom. Basically what happens is, as long as the lens is still zooming (can take up to 2-3 seconds with the cheap olympus 12-50mm we are using for now) it will accept nothing else.

Is this a hardware limitation? Is there any way to implement this?
My guess would be the SetPeriodicFlushInterval or SetParamterPeriodicFlushInterval methods, but frankly, I have no clue about the functionality and the SDK documentation is not of much help here.

Any insight on the matter would be greatly appreciated. Thanks a lot.

Daniel
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Xtreemtec

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  • Joined: Wed Jan 02, 2013 11:48 am
  • Location: The Netherlands

Re: BMMSC: simultaneous zoom & focus possible?

PostSat Feb 06, 2016 9:58 am

I think you can call this a hardware issue.. I'm working with the SDI data comming from an atem.. And data from focus zoom and other functions will be send all together in data blocks..

I think it is the lens manufacturer to blame that it can't handle both actions at the same time..
Daniel Wittenaar .:: Xtreemtec Media Productions ::. -= www.xtreemtec.nl =-
4K OBV, ATEM TVS HD, Production Studio 4K, 2M/E Broadcast Studio 4K, Hyperdeck Studio, SONY FS7 4K, JVC HM700 Full HD Camera
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Mayank K Tyagi

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  • Joined: Tue Sep 12, 2017 3:51 pm

BMMSC: simultaneous zoom & focus possible?

PostTue Sep 12, 2017 4:25 pm

Hi Everyone,

I'm working on a "Blackmagic Micro Studio 4K" cam and controlling it with arduino board using blackmagic 3G-SDI shield.
I'm unable to use its "Zoom" and "Aperture"command as mentioned in its datasheet.

//****************************************************//
//***********sends current zoom value to the cam***********//
//****************************************************//
void SetZoom (currentZoom)
{ currentZoom = constrain(currentZoom, 0.0, 1.0);
sdiCameraControl.writeCommandFixed16(
1, // Destination: Camera 1
0, // Category: Lens
8, // Param: Zoom (normalised)
0, // Operation: Set Absolute,
currentZoom // Values
);
}
//****************************************************//
//*********sends current Aperture value to the cam***********//
//****************************************************//
void SetAperture (currentAperture)
{ currentAperture= constrain(currentAperture, 0.0, 1.0);
sdiCameraControl.writeCommandFixed16(
1, // Destination: Camera 1
0, // Category: Lens
3, // Param: Aperture (normalised)
0, // Operation: Set Absolute,
currentApertureAdjust // Values
);
}
//****************************************************//


Lens i'm using is "Olympus M.Zuiko 14-42mm f3.5-5.6 II R Lens". Is this lens support digital zoom through 3G-SDI shield or I code it wrongly.

want some guidance..Thanks

Mayank (mak)

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