1. A method for positioning a lens relative to an imager, comprising: disposing an accumulation of an adhesive having a viscous form, outside an optical imaging region of said lens and said imager, so that said adhesive exclusively bridges a distance between the lens and the imager; positioning said lens adjacent to said imager a spaced distance apart, separated by at least a portion of said adhesive; aligning said lens at a precise distance from said imager defined by said focal length by selectively displacing a portion of said adhesive.