why does my Usb camera acquire zoom-in images?

[qifa2011]

Hallo, all,

I am using Logitech quickcam Pro9000 and IMAQdx (setup vi,grab.vi) to get image. But i always get zoom-in images. I tried IMAQ USB, I can get clear and original size images,but the problem is when I stop the program by clicking the red circle button on tool bar, my labview 8.6 will be totally shut down.  I think, IMAQdx is the best way to get images. but why does the camera always get the zoom-in images? does anybody know the reason? By the way, does anybody can tell why the problem happened in the case of IMAQ USB ?Moreover, can anybody suggest a method to configure the camera by labview? Thank you very much!

[Silver_Shaper]

1.By clicking red button - Its not a good practice to stop the vi. Use stop button to exit from your program.

2.Zoom - Have u ever changed the zoom in the lens or zoom tool in the image display window, if not so you can set the camera property using property nodes in the vi.