1. A camera for producing visible-light (VL) images and infrared (IR) images, comprising: VL sensors for sensing VL images of a target scene; IR sensors for sensing IR images of the target scene; focusable optics for capturing the target scene; and a display area for displaying a composite image including at least a portion of the VL images and the IR images superimposed and blended in one of a focus mode and an analysis mode, the modes being particular ratios of the amount of VL images to the IR images in the blended composite image, the analysis mode blend ratio being different from the focus mode ratio and being appropriate for analyzing and visualizing the target scene, the focus mode blend ratio being appropriate for focusing the optics, and the display area being switchable between the focus mode and the analysis mode.