I recently purchased a Sony Z5U camcorder and I am very enthused about the product overall; however, I am having difficulty with the focus feature.
I have the camera set up on a tripod against a green screen and I notice that the images from the camera appear very out-of-focus momentarily throughout various pieces of footage. At first I thought it was due to how a subject moved in and out of the line of vision of the camera, or how a subject moved from stage back to stage front (and vice versa), but now it's happening every 5-10 seconds throughout the footage regardless of what the subject is doing.
I've checked different online forums to see what others say may attribute to blurred focus and have found suggestions ranging from lighting to automatic focus settings. Although strong lighting helps a great deal in regard to "graininess," poor focus remains to be an issue.
I know this camera is capable of strong focus because of the dozens of reviews I've read of individuals praising this particular camera for it's outstanding picture quality; however, I am at a loss. Does anyone have any tips/tricks/suggestions regarding my problem???
Thank you for your help!

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