Methods and apparatus for checking the alignment and/or spacing of cameras of a camera pair, e.g., stereoscopic camera pair, are described. Images of a calibration target are captured by first and second cameras of a camera pair being calibrated The captured first and second images, which may correspond to all or a portion of the calibration target, are combined in accordance with the invention to generate a calibration image which is then displayed to an operator of the calibration apparatus including the calibration target. Given the position of at least some different color grid elements in the calibration target, when proper camera spacing and optical axis alignment of the cameras is achieved, the overlaid image will include an overlay of two different color image grid elements resulting in the generated calibration image including grid elements of a different color than that of the overlaid grid elements