Canon EDSDK set focus point

Question

I'm trying to change the focus point on the Camera from a click in a live view frame using the EDSDK lib. I can't figure out how to do it, i mean, don't know what property I must set in order to change the focus point. Do you guys have any idea or any sample? By the way, I'm already able to change some other values like ISO, AV, TV or color temperature.

Thank you in advance!

score 4 · Accepted Answer · answered Jul 03 '16 at 07:53

4

Set an EdsPoint into kEdsPropID_Evf_ZoomPosition before triggering a focus command. The name "Zoom" is a bit confusing, but this property:

Gets/sets the focus and zoom border position for live view. The focus and zoom border is set using EdsCameraRef, but obtained using live view image data, in otherwords, by using EdsEvfImageRef.

answered Jul 03 '16 at 07:53

gdh

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Thanks @gdh, you made my day! – Vinny Jul 18 '16 at 10:30

score 0 · Answer 2 · answered Feb 15 '18 at 07:53

you can set zoom point adding this method to the camera class.

public void SetZoomPositionSetting(PropertyID propID, Point value, int inParam = 0)
{
    CheckState();

    int size = Marshal.SizeOf(typeof(Point));
    ErrorCode err = CanonSDK.EdsSetPropertyData(CamRef, propID, inParam, size, value);
}

and call this method like this. MainCamera.SetZoomPositionSetting(PropertyID.Evf_ZoomPosition, p); p in here is EOSDigital.SDK.Point instance.

and dont forget to change camera setting to AF Live mode.(not quick mode)

Canon EDSDK set focus point

2 Answers2