Edmund Optics (EO) offers an online video lens selector at www.edmundoptics.com/selectionguide that features ratings by flexibility, working distance, image quality, depth of field, integration features and price. The selector enables searches for camera-lens system combinations and includes tutorials on the fundamental parameters of imaging systems. Search variables include mounting type, sensor characteristics, field of view, focal length, working distance and mechanical dimensions. Detail pages include specifications such as how a lens deviates from the input specifications, illumination rolloff and available accessories, as well as mechanical drawing and, for most lenses, test images.