how Many frames?

a Brenizer portrait is effectively a panorama that’s made from multiple frames (which are stitched together in photoshop). this gives a wide-angle picture, but a depth of field that isn’t possible with a wide-angle lens. Don’t shoot too many frames, as stitching them demands a lot of time and power from your computer. around 10 is a good place to start. the best results will come from experimenting and making sure you cover the whole scene.